12557808 has 80 divisors (see below), whose sum is σ = 36976800. Its totient is φ = 4078080.

The previous prime is 12557771. The next prime is 12557813. The reversal of 12557808 is 80875521.

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

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, 17358 + ... + 18066.

It is an arithmetic number, because the mean of its divisors is an integer number (462210).

Almost surely, 2^12557808 is an apocalyptic number.

12557808 is a gapful number since it is divisible by the number (18) 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 12557808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18488400).

12557808 is an abundant number, since it is smaller than the sum of its proper divisors (24418992).

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

12557808 is a wasteful number, since it uses less digits than its factorization.

12557808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767 (or 755 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 36.

The square root of 12557808 is about 3543.6997615487. The cubic root of 12557808 is about 232.4366528772.

The spelling of 12557808 in words is "twelve million, five hundred fifty-seven thousand, eight hundred eight".