Numbers 480,000s

A page of the Numeropedia - the Special Encyclopedia of Numbers

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481,899

[Math.]  A Cullen prime number: 481899´2481899+1. The only known Cullen prime numbers (prime numbers of the form n´2n+1) are with n = 1, 141, 4713, 5795, 6611, 18496, 32292, 32469, 59656, 90825, 262419, 361275 and 481899.

(Masakatu Morii found the last number on 30 September 1998.)

483,717

[Math.]  Two consecutive sums of consecutive numbers:

6084+…+6162 = 6163+…+6240 = 483,717.

486,178

[Math.]  A pair of amicable numbers (469028, 486178).

488,881

[Math.]  A Carmichael number: 488,881 = 37×73×181.

489,951

[Math.]

7,683,984 = 1584×4851 = 27722

782432784 = 15984×48951 = 279722

78384320784 = 159984×489951 = 2799722

7839843200784 = 1599984×4899951 = 27999722

783998432000784 = 15999984×48999951 = 279999722

7839…9984320000784 = 159…999984×489…999951 = 279…9999722

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