12813688 has 8 divisors (see below), whose sum is σ = 24025680. Its totient is φ = 6406840.

The previous prime is 12813677. The next prime is 12813701. The reversal of 12813688 is 88631821.

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

It is a super-2 number, since 2×12813688² = 328381200322688, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 800848 + ... + 800863.

It is an arithmetic number, because the mean of its divisors is an integer number (3003210).

Almost surely, 2^12813688 is an apocalyptic number.

It is an amenable number.

12813688 is a deficient number, since it is larger than the sum of its proper divisors (11211992).

12813688 is a wasteful number, since it uses less digits than its factorization.

12813688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1601717 (or 1601713 counting only the distinct ones).

The product of its digits is 18432, while the sum is 37.

The square root of 12813688 is about 3579.6212090108. The cubic root of 12813688 is about 234.0047725912.

The spelling of 12813688 in words is "twelve million, eight hundred thirteen thousand, six hundred eighty-eight".