31938872448 has 128 divisors (see below), whose sum is σ = 100085207040. Its totient is φ = 8831001600.

The previous prime is 31938872443. The next prime is 31938872477. The reversal of 31938872448 is 84427883913.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×31938872448² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31938872443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108318 + ... + 274973.

It is an arithmetic number, because the mean of its divisors is an integer number (781915680).

Almost surely, 2^31938872448 is an apocalyptic number.

It is an amenable number.

31938872448 is an abundant number, since it is smaller than the sum of its proper divisors (68146334592).

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

31938872448 is a wasteful number, since it uses less digits than its factorization.

31938872448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383346 (or 383334 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 57.

The spelling of 31938872448 in words is "thirty-one billion, nine hundred thirty-eight million, eight hundred seventy-two thousand, four hundred forty-eight".