12639204 has 36 divisors (see below), whose sum is σ = 32252220. Its totient is φ = 4173120.

The previous prime is 12639203. The next prime is 12639217. The reversal of 12639204 is 40293621.

12639204 is a `hidden beast` number, since 1 + 2 + 639 + 20 + 4 = 666.

12639204 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 9290304 + 3348900 = 3048^2 + 1830^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (12639203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2314 + ... + 5534.

It is an arithmetic number, because the mean of its divisors is an integer number (895895).

Almost surely, 2^12639204 is an apocalyptic number.

It is an amenable number.

12639204 is an abundant number, since it is smaller than the sum of its proper divisors (19613016).

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

12639204 is a wasteful number, since it uses less digits than its factorization.

12639204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3340 (or 3335 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 12639204 is about 3555.1658189176. The cubic root of 12639204 is about 232.9377669697.

The spelling of 12639204 in words is "twelve million, six hundred thirty-nine thousand, two hundred four".