287 (number)

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← 286 287 288 →
Cardinaltwo hundred eighty-seven
Ordinal287th
(two hundred eighty-seventh)
Factorization7 × 41
Divisors1, 7, 41, 287
Greek numeralΣΠΖ´
Roman numeralCCLXXXVII
Binary1000111112
Ternary1011223
Senary11556
Octal4378
Duodecimal1BB12
Hexadecimal11F16

287 is the natural number following 286 and preceding 288.

In mathematics[edit]

World Records[edit]

  • On November 15, 2012, in the United Kingdom, the largest toy construction lesson was achieved with 287 participants.[6]
  • On August 8, 2018, in Japan, the largest blind soccer (football) lesson was completed with 287 members.[7]
  • On February 28, 2020, the largest Welsh folk dance was completed in Swansea in the United Kingdom. There were 287 participants.[8]
  • On June 20, 2009, Bora Milutinović completed the Guinness World Record for the greatest number of international soccer matches a coach has been in charge of. He was at 287 games.[9]
  • On December 20, 2020, the largest group of people dressed as the sun was completed in Guangzhou, China. There were 287 participants.[10]

Other fields[edit]

References[edit]

  1. ^ "Composite numbers". mathworld.wolfram.com.
  2. ^ "Pentagonal number". mathworld.wolfram.com.
  3. ^ Sloane, N. J. A. (ed.). "Sequence A046315 (Odd semiprimes: odd numbers divisible by exactly 2 primes (counted with multiplicity))". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  4. ^ Sloane, N. J. A. (ed.). "Sequence A004215 (Numbers that are the sum of 4 but no fewer nonzero squares)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  5. ^ Sloane, N. J. A. (ed.). "Sequence A002822 (Numbers m such that 6m-1, 6m+1 are twin primes)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  6. ^ "287 people at a toy making lesson". www.guinnessworldrecords.com.
  7. ^ "287 person blind soccer lesson". www.guinnessworldrecords.com.
  8. ^ "287 people in a Welsh folk dance". guinnessworldrecords.com.
  9. ^ "287 international soccer games by a single coach". www.guinnessworldrecords.com.
  10. ^ "287 people dressed as the sun". www.guinnessworldrecords.com.
  11. ^ "287 Nephthys information". in-the-sky.org.