31604044 has 12 divisors (see below), whose sum is σ = 55468000. Its totient is φ = 15756048.

The previous prime is 31604033. The next prime is 31604051. The reversal of 31604044 is 44040613.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9924 + ... + 12715.

Almost surely, 2^31604044 is an apocalyptic number.

It is an amenable number.

31604044 is a deficient number, since it is larger than the sum of its proper divisors (23863956).

31604044 is a wasteful number, since it uses less digits than its factorization.

31604044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22992 (or 22990 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 31604044 is about 5621.7474151726. The cubic root of 31604044 is about 316.1653116774.

Adding to 31604044 its reverse (44040613), we get a palindrome (75644657).

It can be divided in two parts, 3160 and 4044, that multiplied together give a triangular number (12779040 = T₅₀₅₅).

The spelling of 31604044 in words is "thirty-one million, six hundred four thousand, forty-four".