12644904 has 16 divisors (see below), whose sum is σ = 31612320. Its totient is φ = 4214960.

The previous prime is 12644903. The next prime is 12644909. The reversal of 12644904 is 40944621.

It is not an unprimeable number, because it can be changed into a prime (12644903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 263412 + ... + 263459.

It is an arithmetic number, because the mean of its divisors is an integer number (1975770).

Almost surely, 2^12644904 is an apocalyptic number.

It is an amenable number.

12644904 is an abundant number, since it is smaller than the sum of its proper divisors (18967416).

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

12644904 is a wasteful number, since it uses less digits than its factorization.

12644904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526880 (or 526876 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 12644904 is about 3555.9673789280. The cubic root of 12644904 is about 232.9727782918.

The spelling of 12644904 in words is "twelve million, six hundred forty-four thousand, nine hundred four".