30831992840 has 64 divisors (see below), whose sum is σ = 76160727360. Its totient is φ = 11140197120.

The previous prime is 30831992783. The next prime is 30831992929. The reversal of 30831992840 is 4829913803.

It is a happy number.

It is a super-2 number, since 2×30831992840² (a number of 22 digits) contains 22 as substring.

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, 154082 + ... + 292241.

It is an arithmetic number, because the mean of its divisors is an integer number (1190011365).

Almost surely, 2^30831992840 is an apocalyptic number.

It is an amenable number.

30831992840 is an abundant number, since it is smaller than the sum of its proper divisors (45328734520).

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

30831992840 is a wasteful number, since it uses less digits than its factorization.

30831992840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446502 (or 446498 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 47.

The spelling of 30831992840 in words is "thirty billion, eight hundred thirty-one million, nine hundred ninety-two thousand, eight hundred forty".