31996312 has 64 divisors (see below), whose sum is σ = 67884480. Its totient is φ = 14057472.

The previous prime is 31996303. The next prime is 31996337. The reversal of 31996312 is 21369913.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

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, 165688 + ... + 165880.

It is an arithmetic number, because the mean of its divisors is an integer number (1060695).

Almost surely, 2^31996312 is an apocalyptic number.

It is an amenable number.

31996312 is an abundant number, since it is smaller than the sum of its proper divisors (35888168).

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

31996312 is a wasteful number, since it uses less digits than its factorization.

31996312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292 (or 288 counting only the distinct ones).

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

The square root of 31996312 is about 5656.5282638735. The cubic root of 31996312 is about 317.4680133936.

The spelling of 31996312 in words is "thirty-one million, nine hundred ninety-six thousand, three hundred twelve".