31889306412 has 72 divisors (see below), whose sum is σ = 84880723200. Its totient is φ = 10066858848.

The previous prime is 31889306389. The next prime is 31889306419. The reversal of 31889306412 is 21460398813.

It is not an unprimeable number, because it can be changed into a prime (31889306419) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2625289 + ... + 2637407.

Almost surely, 2^31889306412 is an apocalyptic number.

It is an amenable number.

31889306412 is an abundant number, since it is smaller than the sum of its proper divisors (52991416788).

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

31889306412 is a wasteful number, since it uses less digits than its factorization.

31889306412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15995 (or 15990 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The spelling of 31889306412 in words is "thirty-one billion, eight hundred eighty-nine million, three hundred six thousand, four hundred twelve".