12689944 has 16 divisors (see below), whose sum is σ = 23896800. Its totient is φ = 6317472.

The previous prime is 12689923. The next prime is 12689969. The reversal of 12689944 is 44998621.

It is a super-2 number, since 2×12689944² = 322069357446272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12689944.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1407 + ... + 5230.

It is an arithmetic number, because the mean of its divisors is an integer number (1493550).

Almost surely, 2^12689944 is an apocalyptic number.

It is an amenable number.

12689944 is a deficient number, since it is larger than the sum of its proper divisors (11206856).

12689944 is a wasteful number, since it uses less digits than its factorization.

12689944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6882 (or 6878 counting only the distinct ones).

The product of its digits is 124416, while the sum is 43.

The square root of 12689944 is about 3562.2947660181. The cubic root of 12689944 is about 233.2490598158.

The spelling of 12689944 in words is "twelve million, six hundred eighty-nine thousand, nine hundred forty-four".