31899662988 has 48 divisors (see below), whose sum is σ = 79920981504. Its totient is φ = 9866778880.

The previous prime is 31899662983. The next prime is 31899663011. The reversal of 31899662988 is 88926699813.

It is not an unprimeable number, because it can be changed into a prime (31899662981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1086720 + ... + 1115687.

It is an arithmetic number, because the mean of its divisors is an integer number (1665020448).

Almost surely, 2^31899662988 is an apocalyptic number.

It is an amenable number.

31899662988 is an abundant number, since it is smaller than the sum of its proper divisors (48021318516).

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

31899662988 is a wasteful number, since it uses less digits than its factorization.

31899662988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2202502 (or 2202500 counting only the distinct ones).

The product of its digits is 80621568, while the sum is 69.

The spelling of 31899662988 in words is "thirty-one billion, eight hundred ninety-nine million, six hundred sixty-two thousand, nine hundred eighty-eight".