31013988 has 48 divisors (see below), whose sum is σ = 73993920. Its totient is φ = 10108800.

The previous prime is 31013971. The next prime is 31013993. The reversal of 31013988 is 88931013.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 171258 + ... + 171438.

It is an arithmetic number, because the mean of its divisors is an integer number (1541540).

Almost surely, 2^31013988 is an apocalyptic number.

It is an amenable number.

31013988 is an abundant number, since it is smaller than the sum of its proper divisors (42979932).

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

31013988 is a wasteful number, since it uses less digits than its factorization.

31013988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428 (or 426 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 31013988 is about 5569.0203806415. The cubic root of 31013988 is about 314.1853072015.

The spelling of 31013988 in words is "thirty-one million, thirteen thousand, nine hundred eighty-eight".