31928990 has 16 divisors (see below), whose sum is σ = 57537648. Its totient is φ = 12757056.

The previous prime is 31928983. The next prime is 31929011. The reversal of 31928990 is 9982913.

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, 13754 + ... + 15906.

It is an arithmetic number, because the mean of its divisors is an integer number (3596103).

Almost surely, 2^31928990 is an apocalyptic number.

31928990 is a deficient number, since it is larger than the sum of its proper divisors (25608658).

31928990 is a wasteful number, since it uses less digits than its factorization.

31928990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3643.

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 31928990 is about 5650.5743070948. The cubic root of 31928990 is about 317.2452003307.

The spelling of 31928990 in words is "thirty-one million, nine hundred twenty-eight thousand, nine hundred ninety".