31990882 has 32 divisors (see below), whose sum is σ = 61231104. Its totient is φ = 12171600.

The previous prime is 31990831. The next prime is 31990897. The reversal of 31990882 is 28809913.

It is a super-2 number, since 2×31990882² = 2046833062275848, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4207 + ... + 9037.

It is an arithmetic number, because the mean of its divisors is an integer number (1913472).

Almost surely, 2^31990882 is an apocalyptic number.

31990882 is a deficient number, since it is larger than the sum of its proper divisors (29240222).

31990882 is a wasteful number, since it uses less digits than its factorization.

31990882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4894.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 31990882 is about 5656.0482671208. The cubic root of 31990882 is about 317.4500535234.

The spelling of 31990882 in words is "thirty-one million, nine hundred ninety thousand, eight hundred eighty-two".