Faster access than browser!
41 relations: Amicable numbers, Centered decagonal number, Centered octagonal number, Chen prime, Eisenstein prime, Endomorphism, Factorial, Flash point, Friedman number, Gross (unit), Harmonic number, Harshad number, Intel 80286, Kynea number, List of highways numbered 280, Natural number, Nontotient, Octagonal number, Paper, Pentagonal number, Pentagonal pyramidal number, Pseudoforest, Pseudoprime, Repdigit, Rules of Acquisition, Self number, Sophie Germain prime, Sphenic number, Square pyramidal number, Star Trek, Strictly non-palindromic number, Tetrahedral number, Tetration, Tree (graph theory), Twin prime, Untouchable number, 220 (number), 270 (number), 280, 280 (number), 284 (number).
Amicable numbers
Amicable numbers are two different numbers so related that the sum of the proper divisors of each is equal to the other number.
New!!: 280 (number) and Amicable numbers · See more »
Centered decagonal number
A centered decagonal number is a centered figurate number that represents a decagon with a dot in the center and all other dots surrounding the center dot in successive decagonal layers.
New!!: 280 (number) and Centered decagonal number · See more »
Centered octagonal number
A centered octagonal number is a centered figurate number that represents an octagon with a dot in the center and all other dots surrounding the center dot in successive octagonal layers.
New!!: 280 (number) and Centered octagonal number · See more »
Chen prime
A prime number p is called a Chen prime if p + 2 is either a prime or a product of two primes (also called a semiprime).
New!!: 280 (number) and Chen prime · See more »
Eisenstein prime
In mathematics, an Eisenstein prime is an Eisenstein integer that is irreducible (or equivalently prime) in the ring-theoretic sense: its only Eisenstein divisors are the units, itself and its associates.
New!!: 280 (number) and Eisenstein prime · See more »
Endomorphism
In mathematics, an endomorphism is a morphism (or homomorphism) from a mathematical object to itself.
New!!: 280 (number) and Endomorphism · See more »
Factorial
In mathematics, the factorial of a non-negative integer n, denoted by n!, is the product of all positive integers less than or equal to n. For example, The value of 0! is 1, according to the convention for an empty product.
New!!: 280 (number) and Factorial · See more »
Flash point
The flash point of a volatile material is the lowest temperature at which vapours of the material will ignite, when given an ignition source.
New!!: 280 (number) and Flash point · See more »
Friedman number
A Friedman number is an integer, which in a given base, is the result of an expression using all its own digits in combination with any of the four basic arithmetic operators (+, −, ×, ÷), additive inverses, parentheses, and exponentiation.
New!!: 280 (number) and Friedman number · See more »
Gross (unit)
In English and related languages, several terms involving the words "great" or "gross" (possibly, from grosse thick) relate to numbers involving multiples of exponents of twelve (dozen).
New!!: 280 (number) and Gross (unit) · See more »
Harmonic number
In mathematics, the -th harmonic number is the sum of the reciprocals of the first natural numbers: Harmonic numbers are related to the harmonic mean in that the -th harmonic number is also times the reciprocal of the harmonic mean of the first positive integers.
New!!: 280 (number) and Harmonic number · See more »
Harshad number
In recreational mathematics, a harshad number (or Niven number) in a given number base, is an integer that is divisible by the sum of its digits when written in that base.
New!!: 280 (number) and Harshad number · See more »
Intel 80286
The Intel 80286 (also marketed as the iAPX 286 and often called Intel 286) is a 16-bit microprocessor that was introduced on 1 February 1982.
New!!: 280 (number) and Intel 80286 · See more »
Kynea number
A Kynea number is an integer of the form An equivalent formula is This indicates that a Kynea number is the nth power of 4 plus the (n + 1)th Mersenne number.
New!!: 280 (number) and Kynea number · See more »
List of highways numbered 280
Route 280, or Highway 280, may refer to.
New!!: 280 (number) and List of highways numbered 280 · See more »
Natural number
In mathematics, the natural numbers are those used for counting (as in "there are six coins on the table") and ordering (as in "this is the third largest city in the country").
New!!: 280 (number) and Natural number · See more »
Nontotient
In number theory, a nontotient is a positive integer n which is not a totient number: it is not in the range of Euler's totient function φ, that is, the equation φ(x).
New!!: 280 (number) and Nontotient · See more »
Octagonal number
An octagonal number is a figurate number that represents an octagon.
New!!: 280 (number) and Octagonal number · See more »
Paper
Paper is a thin material produced by pressing together moist fibres of cellulose pulp derived from wood, rags or grasses, and drying them into flexible sheets.
New!!: 280 (number) and Paper · See more »
Pentagonal number
A pentagonal number is a figurate number that extends the concept of triangular and square numbers to the pentagon, but, unlike the first two, the patterns involved in the construction of pentagonal numbers are not rotationally symmetrical.
New!!: 280 (number) and Pentagonal number · See more »
Pentagonal pyramidal number
A pentagonal pyramidal number is a figurate number that represents the number of objects in a pyramid with a pentagonal base.
New!!: 280 (number) and Pentagonal pyramidal number · See more »
Pseudoforest
In graph theory, a pseudoforest is an undirected graphThe kind of undirected graph considered here is often called a multigraph or pseudograph, to distinguish it from a simple graph.
New!!: 280 (number) and Pseudoforest · See more »
Pseudoprime
A pseudoprime is a probable prime (an integer that shares a property common to all prime numbers) that is not actually prime.
New!!: 280 (number) and Pseudoprime · See more »
Repdigit
In recreational mathematics, a repdigit or sometimes monodigit is a natural number composed of repeated instances of the same digit in a positional number system (often implicitly decimal).
New!!: 280 (number) and Repdigit · See more »
Rules of Acquisition
In the fictional Star Trek universe, the Rules of Acquisition are a collection of sacred business proverbs of the ultra-capitalist race known as the Ferengi.
New!!: 280 (number) and Rules of Acquisition · See more »
Self number
A self number, Colombian number or Devlali number is an integer that cannot be written as the sum of any other integer n and the individual digits of n. This property is specific to the base used to represent the integers.
New!!: 280 (number) and Self number · See more »
Sophie Germain prime
In number theory, a prime number p is a Sophie Germain prime if 2p + 1 is also prime.
New!!: 280 (number) and Sophie Germain prime · See more »
Sphenic number
In number theory, a sphenic number (from σφήνα, 'wedge') is a positive integer that is the product of three distinct prime numbers.
New!!: 280 (number) and Sphenic number · See more »
Square pyramidal number
In mathematics, a pyramid number, or square pyramidal number, is a figurate number that represents the number of stacked spheres in a pyramid with a square base.
New!!: 280 (number) and Square pyramidal number · See more »
Star Trek
Star Trek is an American media franchise based on the science fiction television series created by Gene Roddenberry.
New!!: 280 (number) and Star Trek · See more »
Strictly non-palindromic number
A strictly non-palindromic number is an integer n that is not palindromic in any positional numeral system with a base b in the range 2 ≤ b ≤ n − 2.
New!!: 280 (number) and Strictly non-palindromic number · See more »
Tetrahedral number
A tetrahedral number, or triangular pyramidal number, is a figurate number that represents a pyramid with a triangular base and three sides, called a tetrahedron.
New!!: 280 (number) and Tetrahedral number · See more »
Tetration
In mathematics, tetration (or hyper-4) is the next hyperoperation after exponentiation, and is defined as iterated exponentiation.
New!!: 280 (number) and Tetration · See more »
Tree (graph theory)
In mathematics, and more specifically in graph theory, a tree is an undirected graph in which any two vertices are connected by exactly one path.
New!!: 280 (number) and Tree (graph theory) · See more »
Twin prime
A twin prime is a prime number that is either 2 less or 2 more than another prime number—for example, either member of the twin prime pair (41, 43).
New!!: 280 (number) and Twin prime · See more »
Untouchable number
An untouchable number is a positive integer that cannot be expressed as the sum of all the proper divisors of any positive integer (including the untouchable number itself).
New!!: 280 (number) and Untouchable number · See more »
220 (number)
220 (two hundred twenty) is the natural number following 219 and preceding 221.
New!!: 280 (number) and 220 (number) · See more »
270 (number)
270 (two hundred seventy) is the natural number following 269 and preceding 271.
New!!: 280 (number) and 270 (number) · See more »
280
Year 280 (CCLXXX) was a leap year starting on Thursday (link will display the full calendar) of the Julian calendar.
New!!: 280 (number) and 280 · See more »
280 (number)
280 (two hundred eighty) is the natural number after 279 and before 281.
New!!: 280 (number) and 280 (number) · See more »
284 (number)
Two hundred eighty-four (284, CCLXXXIV) is the natural number following 283 and preceding 285.
New!!: 280 (number) and 284 (number) · See more »
Redirects here:
281 (number), 282 (number), 283 (number), 285 (number), 286 (number), 287 (number), 288 (number), 289 (number), Two hundred eighty, Two hundred eighty-eight, Two hundred eighty-five, Two hundred eighty-nine, Two hundred eighty-one, Two hundred eighty-seven, Two hundred eighty-six, Two hundred eighty-three, Two hundred eighty-two.
References
[1] https://en.wikipedia.org/wiki/280_(number)
