12689904 has 40 divisors (see below), whose sum is σ = 32910592. Its totient is φ = 4213440.

The previous prime is 12689893. The next prime is 12689923. The reversal of 12689904 is 40998621.

It is a super-2 number, since 2×12689904² = 322067327058432, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21939 + ... + 22509.

Almost surely, 2^12689904 is an apocalyptic number.

It is an amenable number.

12689904 is an abundant number, since it is smaller than the sum of its proper divisors (20220688).

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

12689904 is a wasteful number, since it uses less digits than its factorization.

12689904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1045 (or 1039 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 12689904 is about 3562.2891516552. The cubic root of 12689904 is about 233.2488147406.

The spelling of 12689904 in words is "twelve million, six hundred eighty-nine thousand, nine hundred four".