12688918 has 8 divisors (see below), whose sum is σ = 20763720. Its totient is φ = 5767680.

The previous prime is 12688909. The next prime is 12688927. The reversal of 12688918 is 81988621.

It is an interprime number because it is at equal distance from previous prime (12688909) and next prime (12688927).

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

It is a super-2 number, since 2×12688918² = 322017280021448, 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 in 3 ways as a sum of consecutive naturals, for example, 288363 + ... + 288406.

It is an arithmetic number, because the mean of its divisors is an integer number (2595465).

Almost surely, 2^12688918 is an apocalyptic number.

12688918 is a deficient number, since it is larger than the sum of its proper divisors (8074802).

12688918 is a wasteful number, since it uses less digits than its factorization.

12688918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576782.

The product of its digits is 55296, while the sum is 43.

The square root of 12688918 is about 3562.1507548109. The cubic root of 12688918 is about 233.2427734738.

The spelling of 12688918 in words is "twelve million, six hundred eighty-eight thousand, nine hundred eighteen".