31978983792 has 80 divisors (see below), whose sum is σ = 94463953920. Its totient is φ = 9132032256.

The previous prime is 31978983767. The next prime is 31978983821. The reversal of 31978983792 is 29738987913.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 638809 + ... + 687047.

It is an arithmetic number, because the mean of its divisors is an integer number (1180799424).

Almost surely, 2^31978983792 is an apocalyptic number.

It is an amenable number.

31978983792 is an abundant number, since it is smaller than the sum of its proper divisors (62484970128).

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

31978983792 is a wasteful number, since it uses less digits than its factorization.

31978983792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50230 (or 50224 counting only the distinct ones).

The product of its digits is 41150592, while the sum is 66.

The spelling of 31978983792 in words is "thirty-one billion, nine hundred seventy-eight million, nine hundred eighty-three thousand, seven hundred ninety-two".