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From Wikipedia, the free encyclopedia

270 (two hundred [and] seventy) is the natural number following 269 and preceding 271.

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Transcription

Contents

In mathematics

In other fields

Integers from 271 to 279

271

272

272 = 24·17, sum of four consecutive primes (61 + 67 + 71 + 73), Euler number, primitive semiperfect number, pronic number

273

274

274 = 2·137, tribonacci number, Smith number, nontotient, noncototient, centered triangular number

275

275 = 52·11

276

277

278

278 = 2·139, nontotient

279

279 = 32·31 Every positive integer is the sum of at most 279 eighth powers. See Waring's problem.

References

  1. ^ Sloane, N. J. A. (ed.). "Sequence A001599 (Harmonic or Ore numbers)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-28.
  2. ^ Sloane, N. J. A. (ed.). "Sequence A007340". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  3. ^ Sloane, N. J. A. (ed.). "Sequence A003483". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
This page was last edited on 20 August 2019, at 05:35
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