31492972 has 12 divisors (see below), whose sum is σ = 62986000. Its totient is φ = 13496976.

The previous prime is 31492963. The next prime is 31492991. The reversal of 31492972 is 27929413.

31492972 is an admirable number.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

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, 562347 + ... + 562402.

Almost surely, 2^31492972 is an apocalyptic number.

It is an amenable number.

31492972 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

31492972 is a wasteful number, since it uses less digits than its factorization.

31492972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1124760 (or 1124758 counting only the distinct ones).

The product of its digits is 27216, while the sum is 37.

The square root of 31492972 is about 5611.8599412316. The cubic root of 31492972 is about 315.7944906357.

The spelling of 31492972 in words is "thirty-one million, four hundred ninety-two thousand, nine hundred seventy-two".