12657980 has 24 divisors (see below), whose sum is σ = 26656560. Its totient is φ = 5048960.

The previous prime is 12657977. The next prime is 12657991. The reversal of 12657980 is 8975621.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9176 + ... + 10464.

It is an arithmetic number, because the mean of its divisors is an integer number (1110690).

Almost surely, 2^12657980 is an apocalyptic number.

12657980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12657980 is an abundant number, since it is smaller than the sum of its proper divisors (13998580).

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

12657980 is a wasteful number, since it uses less digits than its factorization.

12657980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1789 (or 1787 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 12657980 is about 3557.8055033967. The cubic root of 12657980 is about 233.0530557585.

The spelling of 12657980 in words is "twelve million, six hundred fifty-seven thousand, nine hundred eighty".