12639312 has 60 divisors (see below), whose sum is σ = 40428960. Its totient is φ = 3610944.

The previous prime is 12639283. The next prime is 12639329. The reversal of 12639312 is 21393621.

12639312 is a `hidden beast` number, since 12 + 639 + 3 + 12 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5262 + ... + 7277.

It is an arithmetic number, because the mean of its divisors is an integer number (673816).

Almost surely, 2^12639312 is an apocalyptic number.

12639312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12639312 is an abundant number, since it is smaller than the sum of its proper divisors (27789648).

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

12639312 is a wasteful number, since it uses less digits than its factorization.

12639312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12560 (or 12551 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

The square root of 12639312 is about 3555.1810080501. The cubic root of 12639312 is about 232.9384304399.

The spelling of 12639312 in words is "twelve million, six hundred thirty-nine thousand, three hundred twelve".