31982986 has 24 divisors (see below), whose sum is σ = 56651616. Its totient is φ = 13499640.

The previous prime is 31982957. The next prime is 31982987. The reversal of 31982986 is 68928913.

It is a super-2 number, since 2×31982986² = 2045822786952392, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31982987) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4131 + ... + 9001.

It is an arithmetic number, because the mean of its divisors is an integer number (2360484).

Almost surely, 2^31982986 is an apocalyptic number.

31982986 is a deficient number, since it is larger than the sum of its proper divisors (24668630).

31982986 is a wasteful number, since it uses less digits than its factorization.

31982986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4954 (or 4947 counting only the distinct ones).

The product of its digits is 186624, while the sum is 46.

The square root of 31982986 is about 5655.3502101992. The cubic root of 31982986 is about 317.4239336655.

The spelling of 31982986 in words is "thirty-one million, nine hundred eighty-two thousand, nine hundred eighty-six".