12636644 has 12 divisors (see below), whose sum is σ = 23415084. Its totient is φ = 5946624.

The previous prime is 12636641. The next prime is 12636703. The reversal of 12636644 is 44663621.

12636644 is nontrivially palindromic in base 3.

It can be written as a sum of positive squares in 2 ways, for example, as 8065600 + 4571044 = 2840^2 + 2138^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12636644.

It is not an unprimeable number, because it can be changed into a prime (12636641) 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, 92849 + ... + 92984.

It is an arithmetic number, because the mean of its divisors is an integer number (1951257).

Almost surely, 2^12636644 is an apocalyptic number.

It is an amenable number.

12636644 is a deficient number, since it is larger than the sum of its proper divisors (10778440).

12636644 is a wasteful number, since it uses less digits than its factorization.

12636644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185854 (or 185852 counting only the distinct ones).

The product of its digits is 20736, while the sum is 32.

The square root of 12636644 is about 3554.8057612196. The cubic root of 12636644 is about 232.9220391610.

The spelling of 12636644 in words is "twelve million, six hundred thirty-six thousand, six hundred forty-four".