12639344 has 10 divisors (see below), whose sum is σ = 24488760. Its totient is φ = 6319664.

The previous prime is 12639329. The next prime is 12639353. The reversal of 12639344 is 44393621.

It is a self number, because there is not a number n which added to its sum of digits gives 12639344.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 394964 + ... + 394995.

It is an arithmetic number, because the mean of its divisors is an integer number (2448876).

Almost surely, 2^12639344 is an apocalyptic number.

It is an amenable number.

12639344 is a deficient number, since it is larger than the sum of its proper divisors (11849416).

12639344 is an equidigital number, since it uses as much as digits as its factorization.

12639344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789967 (or 789961 counting only the distinct ones).

The product of its digits is 15552, while the sum is 32.

The square root of 12639344 is about 3555.1855085213. The cubic root of 12639344 is about 232.9386270230.

The spelling of 12639344 in words is "twelve million, six hundred thirty-nine thousand, three hundred forty-four".