31972892 has 18 divisors (see below), whose sum is σ = 65088072. Its totient is φ = 13702584.

The previous prime is 31972883. The next prime is 31972901. The reversal of 31972892 is 29827913.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (31972883) and next prime (31972901).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 81368 + ... + 81759.

It is an arithmetic number, because the mean of its divisors is an integer number (3616004).

Almost surely, 2^31972892 is an apocalyptic number.

It is an amenable number.

31972892 is an abundant number, since it is smaller than the sum of its proper divisors (33115180).

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

31972892 is a wasteful number, since it uses less digits than its factorization.

31972892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163145 (or 163136 counting only the distinct ones).

The product of its digits is 54432, while the sum is 41.

The square root of 31972892 is about 5654.4577105148. The cubic root of 31972892 is about 317.3905365928.

The spelling of 31972892 in words is "thirty-one million, nine hundred seventy-two thousand, eight hundred ninety-two".