12639372 has 24 divisors (see below), whose sum is σ = 29694000. Its totient is φ = 4184256.

The previous prime is 12639371. The next prime is 12639379. The reversal of 12639372 is 27393621.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (12639371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1747 + ... + 5322.

It is an arithmetic number, because the mean of its divisors is an integer number (1237250).

Almost surely, 2^12639372 is an apocalyptic number.

12639372 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12639372 is an abundant number, since it is smaller than the sum of its proper divisors (17054628).

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

12639372 is a wasteful number, since it uses less digits than its factorization.

12639372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7225 (or 7223 counting only the distinct ones).

The product of its digits is 13608, while the sum is 33.

The square root of 12639372 is about 3555.1894464290. The cubic root of 12639372 is about 232.9387990329.

The spelling of 12639372 in words is "twelve million, six hundred thirty-nine thousand, three hundred seventy-two".