331307988 has 48 divisors (see below), whose sum is σ = 854031360. Its totient is φ = 99122400.

The previous prime is 331307987. The next prime is 331307993. The reversal of 331307988 is 889703133.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331307983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5458 + ... + 26313.

It is an arithmetic number, because the mean of its divisors is an integer number (17792320).

Almost surely, 2^331307988 is an apocalyptic number.

It is an amenable number.

331307988 is an abundant number, since it is smaller than the sum of its proper divisors (522723372).

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

331307988 is a wasteful number, since it uses less digits than its factorization.

331307988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31868 (or 31866 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 331307988 is about 18201.8677063646. The cubic root of 331307988 is about 691.9541245051.

The spelling of 331307988 in words is "three hundred thirty-one million, three hundred seven thousand, nine hundred eighty-eight".