12688864 has 12 divisors (see below), whose sum is σ = 24981264. Its totient is φ = 6344416.

The previous prime is 12688859. The next prime is 12688867. The reversal of 12688864 is 46888621.

It is a super-2 number, since 2×12688864² = 322014539220992, 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 12688864.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12688867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198232 + ... + 198295.

It is an arithmetic number, because the mean of its divisors is an integer number (2081772).

Almost surely, 2^12688864 is an apocalyptic number.

It is an amenable number.

12688864 is a deficient number, since it is larger than the sum of its proper divisors (12292400).

12688864 is an equidigital number, since it uses as much as digits as its factorization.

12688864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396537 (or 396529 counting only the distinct ones).

The product of its digits is 147456, while the sum is 43.

The square root of 12688864 is about 3562.1431751124. The cubic root of 12688864 is about 233.2424426043.

The spelling of 12688864 in words is "twelve million, six hundred eighty-eight thousand, eight hundred sixty-four".