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28937654144 = 27756832
BaseRepresentation
bin11010111100110100…
…011000111110000000
32202200201022010211022
4122330310120332000
5433231014413034
621143242205012
72043050000420
oct327464307600
982621263738
1028937654144
11112aa607953
1257371b3768
132962269299
14158730c480
15b4572eb2e
hex6bcd18f80

28937654144 has 48 divisors (see below), whose sum is σ = 65896432920. Its totient is φ = 12399669504.

The previous prime is 28937654129. The next prime is 28937654149. The reversal of 28937654144 is 44145673982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28937654149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5089127 + ... + 5094809.

Almost surely, 228937654144 is an apocalyptic number.

It is an amenable number.

28937654144 is an abundant number, since it is smaller than the sum of its proper divisors (36958778776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28937654144 is an frugal number, since it uses more digits than its factorization.

28937654144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11387 (or 5692 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 53.

The spelling of 28937654144 in words is "twenty-eight billion, nine hundred thirty-seven million, six hundred fifty-four thousand, one hundred forty-four".

Divisors: 1 2 4 7 8 14 16 28 32 56 64 112 128 224 448 896 5683 11366 22732 39781 45464 79562 90928 159124 181856 318248 363712 636496 727424 1272992 2545984 5091968 32296489 64592978 129185956 226075423 258371912 452150846 516743824 904301692 1033487648 1808603384 2066975296 3617206768 4133950592 7234413536 14468827072 28937654144