12656880 has 60 divisors (see below), whose sum is σ = 42508440. Its totient is φ = 3374976.

The previous prime is 12656873. The next prime is 12656881. The reversal of 12656880 is 8865621.

It is a happy number.

12656880 is a `hidden beast` number, since 12 + 6 + 568 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (60).

It is a super-2 number, since 2×12656880² = 320393222668800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12656881) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8070 + ... + 9509.

It is an arithmetic number, because the mean of its divisors is an integer number (708474).

Almost surely, 2^12656880 is an apocalyptic number.

12656880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12656880 is an abundant number, since it is smaller than the sum of its proper divisors (29851560).

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

12656880 is a wasteful number, since it uses less digits than its factorization.

12656880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17598 (or 17589 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 12656880 is about 3557.6509103621. The cubic root of 12656880 is about 233.0463046606.

The spelling of 12656880 in words is "twelve million, six hundred fifty-six thousand, eight hundred eighty".