12689880 has 64 divisors (see below), whose sum is σ = 43511040. Its totient is φ = 2900352.

The previous prime is 12689863. The next prime is 12689893. The reversal of 12689880 is 8898621.

It is a super-2 number, since 2×12689880² = 322066108828800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6714 + ... + 8393.

It is an arithmetic number, because the mean of its divisors is an integer number (679860).

Almost surely, 2^12689880 is an apocalyptic number.

12689880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12689880 is an abundant number, since it is smaller than the sum of its proper divisors (30821160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12689880 is a wasteful number, since it uses less digits than its factorization.

12689880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15128 (or 15124 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 42.

The square root of 12689880 is about 3562.2857830331. The cubic root of 12689880 is about 233.2486676953.

The spelling of 12689880 in words is "twelve million, six hundred eighty-nine thousand, eight hundred eighty".