31982928 has 40 divisors (see below), whose sum is σ = 86973600. Its totient is φ = 10099584.

The previous prime is 31982887. The next prime is 31982939. The reversal of 31982928 is 82928913.

It is a self number, because there is not a number n which added to its sum of digits gives 31982928.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16623 + ... + 18446.

It is an arithmetic number, because the mean of its divisors is an integer number (2174340).

Almost surely, 2^31982928 is an apocalyptic number.

31982928 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

31982928 is an abundant number, since it is smaller than the sum of its proper divisors (54990672).

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

31982928 is a wasteful number, since it uses less digits than its factorization.

31982928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35099 (or 35093 counting only the distinct ones).

The product of its digits is 62208, while the sum is 42.

The square root of 31982928 is about 5655.3450823093. The cubic root of 31982928 is about 317.4237417864.

The spelling of 31982928 in words is "thirty-one million, nine hundred eighty-two thousand, nine hundred twenty-eight".