31992071904 has 384 divisors, whose sum is σ = 107723105280. Its totient is φ = 9158510592.

The previous prime is 31992071857. The next prime is 31992071977. The reversal of 31992071904 is 40917029913.

It is a self number, because there is not a number n which added to its sum of digits gives 31992071904.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9556759 + ... + 9560105.

It is an arithmetic number, because the mean of its divisors is an integer number (280528920).

Almost surely, 2^31992071904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31992071904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53861552640).

31992071904 is an abundant number, since it is smaller than the sum of its proper divisors (75731033376).

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

31992071904 is a wasteful number, since it uses less digits than its factorization.

31992071904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3439 (or 3425 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The spelling of 31992071904 in words is "thirty-one billion, nine hundred ninety-two million, seventy-one thousand, nine hundred four".