31604240840 has 32 divisors (see below), whose sum is σ = 73403400960. Its totient is φ = 12233899200.

The previous prime is 31604240839. The next prime is 31604240869. The reversal of 31604240840 is 4804240613.

It is a junction number, because it is equal to n+sod(n) for n = 31604240797 and 31604240806.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12742406 + ... + 12744885.

It is an arithmetic number, because the mean of its divisors is an integer number (2293856280).

Almost surely, 2^31604240840 is an apocalyptic number.

It is an amenable number.

31604240840 is an abundant number, since it is smaller than the sum of its proper divisors (41799160120).

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

31604240840 is a wasteful number, since it uses less digits than its factorization.

31604240840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25487333 (or 25487329 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

The spelling of 31604240840 in words is "thirty-one billion, six hundred four million, two hundred forty thousand, eight hundred forty".