12739688 has 16 divisors (see below), whose sum is σ = 25724580. Its totient is φ = 5879808.

The previous prime is 12739687. The next prime is 12739691. The reversal of 12739688 is 88693721.

It can be written as a sum of positive squares in 2 ways, for example, as 12096484 + 643204 = 3478^2 + 802^2 .

It is not an unprimeable number, because it can be changed into a prime (12739687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61145 + ... + 61352.

Almost surely, 2^12739688 is an apocalyptic number.

It is an amenable number.

12739688 is an abundant number, since it is smaller than the sum of its proper divisors (12984892).

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

12739688 is a wasteful number, since it uses less digits than its factorization.

12739688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122516 (or 122512 counting only the distinct ones).

The product of its digits is 145152, while the sum is 44.

The square root of 12739688 is about 3569.2699533658. The cubic root of 12739688 is about 233.5534376608.

The spelling of 12739688 in words is "twelve million, seven hundred thirty-nine thousand, six hundred eighty-eight".