12857508 has 96 divisors (see below), whose sum is σ = 36288000. Its totient is φ = 3921408.

The previous prime is 12857503. The next prime is 12857513. The reversal of 12857508 is 80575821.

It is an interprime number because it is at equal distance from previous prime (12857503) and next prime (12857513).

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

It is not an unprimeable number, because it can be changed into a prime (12857503) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 86218 + ... + 86366.

It is an arithmetic number, because the mean of its divisors is an integer number (378000).

Almost surely, 2^12857508 is an apocalyptic number.

12857508 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 12857508, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18144000).

12857508 is an abundant number, since it is smaller than the sum of its proper divisors (23430492).

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

12857508 is a wasteful number, since it uses less digits than its factorization.

12857508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226 (or 218 counting only the distinct ones).

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

The square root of 12857508 is about 3585.7367443804. The cubic root of 12857508 is about 234.2712174113.

It can be divided in two parts, 12857 and 508, that multiplied together give a palindrome (6531356).

The spelling of 12857508 in words is "twelve million, eight hundred fifty-seven thousand, five hundred eight".