280 (number)
Two hundred and eighty redirects here. This article is relating to the numbers going from 280 to 289. For the years , to see 280, 281, 282, 283, 284, 285, 286, 287, 288, 289.
280
In mathematics
Two hundred and eighty is:- 280 = 2 ³ x5x7
- the denominator of the harmonic eighth Number,
- a octagonal Number.
- there exist 280 trees planar with ten nodes.
- a Number Harshad in Base 10.
In other fields
Two hundred and eighty is also:- With the the United States, there exist four Interstate 280 different, in the past, there were six of them.
- historical Years: -280, 280
281
In mathematics
Two hundred and eighty and a is:- a Prime number,
- a prime number twin with 283,
- a Prime number of Sophie Germain,
- the sum of the first fourteen prime numbers,
- the sum of seven prime numbers consecutive (29 + 31 + 37 + 41 + 43 + 47 + 53),
- a Prime number of Chen,
- a Prime number of Eisenstein without imaginary part,
- a décagonal Number centered.
In other fields
Two hundred and eighty and a is also:
282
In mathematics
Two hundred and eighty two is:- 282 = 2x3x47,
- a Number sphenic.
In other fields
Two hundred and eighty two is also:
283
In mathematics
Two hundred and eighty three is:- a Prime number,
- a prime number twin with 281,
- a Number strictly non-palindrome.
In other fields
Two hundred and eighty three is also:
284
In mathematics
Two hundred and eighty four is:- 284 = 2 ² x71
- a friendly Number with 220,
- a Anti-indicator.
In other fields
Two hundred and eighty four is also:- the Point flash of the Paper in degrees Celsius.
- historical Years: -284, 284
285
In mathematics
Two hundred and eighty five is:- 285 = 3x5x19,
- a square pyramidal Number,
- a Number Harshad,
- a uniform Nombre bases 7 of them (555).
- a Number sphenic.
In other fields
Two hundred and eighty five is also:
286
In mathematics
Two hundred and eighty six is:- 286 = 2x11x13,
- a tetrahedral Number,
- a Anti-indicator,
- a Number sphenic,
In other fields
Two hundred and eighty six is also:- an abbreviation of the microprocessor Intel 80286.
- historical Years: -286, 286
287
In mathematics
Two hundred and eighty seven is:- 287 = 7x41,
- the sum of three consecutive prime numbers (89 + 97 + 101),
- the sum of five consecutive prime numbers (47 + 53 + 59 + 61 + 67),
- the sum of nine consecutive prime numbers (17 + 19 + 23 + 29 + 31 + 37 + 41 + 43 + 47),
- a Nombre of Kynea,
- a pentagonal Nombre.
In other fields
Two hundred and eighty seven is also:
288
In mathematics
Two hundred and eighty eight is:- 288 = 25x3 ²,
- a pentagonal pyramidal Number,
- 5 superfactorielle,
- a untouchable Number,
- a Number Harshad,
- a Car number,
In other fields
Two hundred and eighty eight is also:- two large (2 times twelve dozen), often expressed like a pun in the Anglo-Saxon classes of maths.
- historical Years: -288, 288
289
In mathematics
Two hundred and eighty-nine is:- 289 = 17 ²,
- a octagonal Number centered,
- a Number of Friedman since (8 + 9) ² = 289
In other fields
Two hundred and eighty-nine is also:
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