31664204 has 48 divisors (see below), whose sum is σ = 65663136. Its totient is φ = 13171200.

The previous prime is 31664197. The next prime is 31664209. The reversal of 31664204 is 40246613.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31664209) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 112544 + ... + 112824.

It is an arithmetic number, because the mean of its divisors is an integer number (1367982).

Almost surely, 2^31664204 is an apocalyptic number.

It is an amenable number.

31664204 is an abundant number, since it is smaller than the sum of its proper divisors (33998932).

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

31664204 is a wasteful number, since it uses less digits than its factorization.

31664204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506 (or 504 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 31664204 is about 5627.0955207816. The cubic root of 31664204 is about 316.3657970863.

The spelling of 31664204 in words is "thirty-one million, six hundred sixty-four thousand, two hundred four".