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31306288928 = 253131558759
BaseRepresentation
bin11101001010000000…
…000000111100100000
32222210210022020220112
4131022000000330200
51003103402221203
622214254230452
72155541031245
oct351200007440
988723266815
1031306288928
1112305647262
1260984b5428
132c4bbc2725
14172db255cc
15c3365c6d8
hex74a000f20

31306288928 has 24 divisors (see below), whose sum is σ = 63622460160. Its totient is φ = 15148203840.

The previous prime is 31306288927. The next prime is 31306288939. The reversal of 31306288928 is 82988260313.

It is not an unprimeable number, because it can be changed into a prime (31306288927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15778388 + ... + 15780371.

It is an arithmetic number, because the mean of its divisors is an integer number (2650935840).

Almost surely, 231306288928 is an apocalyptic number.

It is an amenable number.

31306288928 is an abundant number, since it is smaller than the sum of its proper divisors (32316171232).

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

31306288928 is a wasteful number, since it uses less digits than its factorization.

31306288928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31558800 (or 31558792 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 50.

The spelling of 31306288928 in words is "thirty-one billion, three hundred six million, two hundred eighty-eight thousand, nine hundred twenty-eight".

Divisors: 1 2 4 8 16 31 32 62 124 248 496 992 31558759 63117518 126235036 252470072 504940144 978321529 1009880288 1956643058 3913286116 7826572232 15653144464 31306288928