12656636 has 24 divisors (see below), whose sum is σ = 23562000. Its totient is φ = 5928192.

The previous prime is 12656629. The next prime is 12656639. The reversal of 12656636 is 63665621.

It is a junction number, because it is equal to n+sod(n) for n = 12656596 and 12656605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12656639) 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, 25115 + ... + 25613.

It is an arithmetic number, because the mean of its divisors is an integer number (981750).

Almost surely, 2^12656636 is an apocalyptic number.

It is an amenable number.

12656636 is a deficient number, since it is larger than the sum of its proper divisors (10905364).

12656636 is a wasteful number, since it uses less digits than its factorization.

12656636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 893 (or 891 counting only the distinct ones).

The product of its digits is 38880, while the sum is 35.

The square root of 12656636 is about 3557.6166179059. The cubic root of 12656636 is about 233.0448070913.

The spelling of 12656636 in words is "twelve million, six hundred fifty-six thousand, six hundred thirty-six".