31620412 has 12 divisors (see below), whose sum is σ = 55543320. Its totient is φ = 15750896.

The previous prime is 31620409. The next prime is 31620431. The reversal of 31620412 is 21402613.

It is a self number, because there is not a number n which added to its sum of digits gives 31620412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13618 + ... + 15769.

It is an arithmetic number, because the mean of its divisors is an integer number (4628610).

Almost surely, 2^31620412 is an apocalyptic number.

It is an amenable number.

31620412 is a deficient number, since it is larger than the sum of its proper divisors (23922908).

31620412 is a wasteful number, since it uses less digits than its factorization.

31620412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29660 (or 29658 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 31620412 is about 5623.2030018487. The cubic root of 31620412 is about 316.2198838148.

The spelling of 31620412 in words is "thirty-one million, six hundred twenty thousand, four hundred twelve".