12644404 has 24 divisors (see below), whose sum is σ = 23079168. Its totient is φ = 6054720.

The previous prime is 12644393. The next prime is 12644459. The reversal of 12644404 is 40444621.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12792 + ... + 13744.

It is an arithmetic number, because the mean of its divisors is an integer number (961632).

Almost surely, 2^12644404 is an apocalyptic number.

It is an amenable number.

12644404 is a deficient number, since it is larger than the sum of its proper divisors (10434764).

12644404 is a wasteful number, since it uses less digits than its factorization.

12644404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1095 (or 1093 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 12644404 is about 3555.8970738760. The cubic root of 12644404 is about 232.9697075442.

The spelling of 12644404 in words is "twelve million, six hundred forty-four thousand, four hundred four".