12863656 has 32 divisors (see below), whose sum is σ = 26157600. Its totient is φ = 5895360.

The previous prime is 12863633. The next prime is 12863657. The reversal of 12863656 is 65636821.

It is not an unprimeable number, because it can be changed into a prime (12863657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18271 + ... + 18961.

It is an arithmetic number, because the mean of its divisors is an integer number (817425).

Almost surely, 2^12863656 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 12863656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13078800).

12863656 is an abundant number, since it is smaller than the sum of its proper divisors (13293944).

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

12863656 is a wasteful number, since it uses less digits than its factorization.

12863656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889 (or 885 counting only the distinct ones).

The product of its digits is 51840, while the sum is 37.

The square root of 12863656 is about 3586.5939273913. The cubic root of 12863656 is about 234.3085514975.

The spelling of 12863656 in words is "twelve million, eight hundred sixty-three thousand, six hundred fifty-six".