12639208 has 8 divisors (see below), whose sum is σ = 23698530. Its totient is φ = 6319600.

The previous prime is 12639203. The next prime is 12639217. The reversal of 12639208 is 80293621.

12639208 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 only one way, i.e., 11682724 + 956484 = 3418^2 + 978^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 12639208.

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 as a sum of consecutive naturals, namely, 789943 + ... + 789958.

Almost surely, 2^12639208 is an apocalyptic number.

It is an amenable number.

12639208 is a deficient number, since it is larger than the sum of its proper divisors (11059322).

12639208 is a wasteful number, since it uses less digits than its factorization.

12639208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1579907 (or 1579903 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 12639208 is about 3555.1663814792. The cubic root of 12639208 is about 232.9377915427.

The spelling of 12639208 in words is "twelve million, six hundred thirty-nine thousand, two hundred eight".