31693716 has 36 divisors (see below), whose sum is σ = 81087552. Its totient is φ = 10436304.

The previous prime is 31693703. The next prime is 31693733. The reversal of 31693716 is 61739613.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2316 + ... + 8291.

It is an arithmetic number, because the mean of its divisors is an integer number (2252432).

Almost surely, 2^31693716 is an apocalyptic number.

31693716 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

31693716 is an abundant number, since it is smaller than the sum of its proper divisors (49393836).

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

31693716 is a wasteful number, since it uses less digits than its factorization.

31693716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10700 (or 10695 counting only the distinct ones).

The product of its digits is 20412, while the sum is 36.

The square root of 31693716 is about 5629.7172220281. The cubic root of 31693716 is about 316.4640540775.

The spelling of 31693716 in words is "thirty-one million, six hundred ninety-three thousand, seven hundred sixteen".