12189664 has 24 divisors (see below), whose sum is σ = 24152688. Its totient is φ = 6055680.

The previous prime is 12189647. The next prime is 12189677. The reversal of 12189664 is 46698121.

12189664 = T₂₅₆ + T₂₅₇ + ... + T₄₄₇.

It is a happy number.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4204 + ... + 6484.

It is an arithmetic number, because the mean of its divisors is an integer number (1006362).

Almost surely, 2^12189664 is an apocalyptic number.

It is an amenable number.

12189664 is a deficient number, since it is larger than the sum of its proper divisors (11963024).

12189664 is a wasteful number, since it uses less digits than its factorization.

12189664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2458 (or 2450 counting only the distinct ones).

The product of its digits is 20736, while the sum is 37.

The square root of 12189664 is about 3491.3699317030. The cubic root of 12189664 is about 230.1427217526.

The spelling of 12189664 in words is "twelve million, one hundred eighty-nine thousand, six hundred sixty-four".