31373992 has 16 divisors (see below), whose sum is σ = 63351540. Its totient is φ = 14480256.

The previous prime is 31373989. The next prime is 31374011. The reversal of 31373992 is 29937313.

It can be written as a sum of positive squares in 2 ways, for example, as 30846916 + 527076 = 5554^2 + 726^2 .

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, 150733 + ... + 150940.

Almost surely, 2^31373992 is an apocalyptic number.

It is an amenable number.

31373992 is an abundant number, since it is smaller than the sum of its proper divisors (31977548).

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

31373992 is a wasteful number, since it uses less digits than its factorization.

31373992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301692 (or 301688 counting only the distinct ones).

The product of its digits is 30618, while the sum is 37.

The square root of 31373992 is about 5601.2491463958. The cubic root of 31373992 is about 315.3962997303.

It can be divided in two parts, 313 and 73992, that added together give a triangular number (74305 = T₃₈₅).

The spelling of 31373992 in words is "thirty-one million, three hundred seventy-three thousand, nine hundred ninety-two".