12857408 has 28 divisors (see below), whose sum is σ = 25847040. Its totient is φ = 6344832.

The previous prime is 12857407. The next prime is 12857413. The reversal of 12857408 is 80475821.

It is not an unprimeable number, because it can be changed into a prime (12857407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3785 + ... + 6327.

Almost surely, 2^12857408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12857408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12923520).

12857408 is an abundant number, since it is smaller than the sum of its proper divisors (12989632).

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

12857408 is an equidigital number, since it uses as much as digits as its factorization.

12857408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2634 (or 2624 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 12857408 is about 3585.7228002176. The cubic root of 12857408 is about 234.2706100571.

The spelling of 12857408 in words is "twelve million, eight hundred fifty-seven thousand, four hundred eight".