31690960 has 40 divisors (see below), whose sum is σ = 84208896. Its totient is φ = 10865280.

The previous prime is 31690931. The next prime is 31691017. The reversal of 31690960 is 6909613.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27736 + ... + 28855.

Almost surely, 2^31690960 is an apocalyptic number.

It is an amenable number.

31690960 is an abundant number, since it is smaller than the sum of its proper divisors (52517936).

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

31690960 is a wasteful number, since it uses less digits than its factorization.

31690960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56611 (or 56605 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 31690960 is about 5629.4724441994. The cubic root of 31690960 is about 316.4548808583.

It can be divided in two parts, 316909 and 60, that added together give a square (316969 = 563²).

The spelling of 31690960 in words is "thirty-one million, six hundred ninety thousand, nine hundred sixty".