13688518 has 8 divisors (see below), whose sum is σ = 20548512. Its totient is φ = 6839016.

The previous prime is 13688503. The next prime is 13688527. The reversal of 13688518 is 81588631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3496 + ... + 6292.

It is an arithmetic number, because the mean of its divisors is an integer number (2568564).

Almost surely, 2^13688518 is an apocalyptic number.

13688518 is a deficient number, since it is larger than the sum of its proper divisors (6859994).

13688518 is a wasteful number, since it uses less digits than its factorization.

13688518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5246.

The product of its digits is 46080, while the sum is 40.

The square root of 13688518 is about 3699.7997243094. The cubic root of 13688518 is about 239.2133852869.

The spelling of 13688518 in words is "thirteen million, six hundred eighty-eight thousand, five hundred eighteen".