12647644 has 12 divisors (see below), whose sum is σ = 22246000. Its totient is φ = 6291648.

The previous prime is 12647627. The next prime is 12647647. The reversal of 12647644 is 44674621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12647647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7149 + ... + 8740.

Almost surely, 2^12647644 is an apocalyptic number.

It is an amenable number.

12647644 is a deficient number, since it is larger than the sum of its proper divisors (9598356).

12647644 is a wasteful number, since it uses less digits than its factorization.

12647644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16092 (or 16090 counting only the distinct ones).

The product of its digits is 32256, while the sum is 34.

The square root of 12647644 is about 3556.3526259357. The cubic root of 12647644 is about 232.9896045513.

The spelling of 12647644 in words is "twelve million, six hundred forty-seven thousand, six hundred forty-four".