12688870 has 32 divisors (see below), whose sum is σ = 24406272. Its totient is φ = 4738272.

The previous prime is 12688867. The next prime is 12688873. The reversal of 12688870 is 7888621.

It is an interprime number because it is at equal distance from previous prime (12688867) and next prime (12688873).

It is a super-2 number, since 2×12688870² = 322014843753800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12688873) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 9249 + ... + 10531.

It is an arithmetic number, because the mean of its divisors is an integer number (762696).

Almost surely, 2^12688870 is an apocalyptic number.

12688870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12688870 is a deficient number, since it is larger than the sum of its proper divisors (11717402).

12688870 is a wasteful number, since it uses less digits than its factorization.

12688870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1356.

The product of its (nonzero) digits is 43008, while the sum is 40.

The square root of 12688870 is about 3562.1440173019. The cubic root of 12688870 is about 233.2424793676.

The spelling of 12688870 in words is "twelve million, six hundred eighty-eight thousand, eight hundred seventy".