12856536 has 128 divisors (see below), whose sum is σ = 44582400. Its totient is φ = 3335040.

The previous prime is 12856523. The next prime is 12856549. The reversal of 12856536 is 63565821.

It is an interprime number because it is at equal distance from previous prime (12856523) and next prime (12856549).

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

It is a self number, because there is not a number n which added to its sum of digits gives 12856536.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16246 + ... + 17018.

It is an arithmetic number, because the mean of its divisors is an integer number (348300).

Almost surely, 2^12856536 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 12856536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22291200).

12856536 is an abundant number, since it is smaller than the sum of its proper divisors (31725864).

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

12856536 is a wasteful number, since it uses less digits than its factorization.

12856536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 806 (or 796 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 12856536 is about 3585.6012048191. The cubic root of 12856536 is about 234.2653137955.

The spelling of 12856536 in words is "twelve million, eight hundred fifty-six thousand, five hundred thirty-six".