12657880 has 32 divisors (see below), whose sum is σ = 28887840. Its totient is φ = 4990720.

The previous prime is 12657871. The next prime is 12657901. The reversal of 12657880 is 8875621.

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, 612 + ... + 5068.

It is an arithmetic number, because the mean of its divisors is an integer number (902745).

Almost surely, 2^12657880 is an apocalyptic number.

12657880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12657880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14443920).

12657880 is an abundant number, since it is smaller than the sum of its proper divisors (16229960).

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

12657880 is a wasteful number, since it uses less digits than its factorization.

12657880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4539 (or 4535 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 12657880 is about 3557.7914497621. The cubic root of 12657880 is about 233.0524420385.

The spelling of 12657880 in words is "twelve million, six hundred fifty-seven thousand, eight hundred eighty".