31272988 has 12 divisors (see below), whose sum is σ = 55159552. Its totient is φ = 15513120.

The previous prime is 31272973. The next prime is 31273007. The reversal of 31272988 is 88927213.

It is a self number, because there is not a number n which added to its sum of digits gives 31272988.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30273 + ... + 31288.

Almost surely, 2^31272988 is an apocalyptic number.

It is an amenable number.

31272988 is a deficient number, since it is larger than the sum of its proper divisors (23886564).

31272988 is a wasteful number, since it uses less digits than its factorization.

31272988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61692 (or 61690 counting only the distinct ones).

The product of its digits is 48384, while the sum is 40.

The square root of 31272988 is about 5592.2256749884. The cubic root of 31272988 is about 315.0574783833.

The spelling of 31272988 in words is "thirty-one million, two hundred seventy-two thousand, nine hundred eighty-eight".