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31398503584 = 257140171891
BaseRepresentation
bin11101001111011111…
…110010010010100000
310000001012211020122011
4131033133302102200
51003301004103314
622231350522304
72161040606530
oct351737622240
9100035736564
1031398503584
1112352700518
126103366394
132c6503b706
14173c08b4c0
15c3b7c54c4
hex74f7f24a0

31398503584 has 24 divisors (see below), whose sum is σ = 70646633568. Its totient is φ = 13456501440.

The previous prime is 31398503581. The next prime is 31398503603. The reversal of 31398503584 is 48530589313.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (31398503581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70085722 + ... + 70086169.

It is an arithmetic number, because the mean of its divisors is an integer number (2943609732).

Almost surely, 231398503584 is an apocalyptic number.

It is an amenable number.

31398503584 is an abundant number, since it is smaller than the sum of its proper divisors (39248129984).

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

31398503584 is a wasteful number, since it uses less digits than its factorization.

31398503584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140171908 (or 140171900 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 49.

The spelling of 31398503584 in words is "thirty-one billion, three hundred ninety-eight million, five hundred three thousand, five hundred eighty-four".

Divisors: 1 2 4 7 8 14 16 28 32 56 112 224 140171891 280343782 560687564 981203237 1121375128 1962406474 2242750256 3924812948 4485500512 7849625896 15699251792 31398503584