12618644 has 12 divisors (see below), whose sum is σ = 22188768. Its totient is φ = 6279000.

The previous prime is 12618629. The next prime is 12618649. The reversal of 12618644 is 44681621.

It is a self number, because there is not a number n which added to its sum of digits gives 12618644.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12618649) 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, 6632 + ... + 8319.

It is an arithmetic number, because the mean of its divisors is an integer number (1849064).

Almost surely, 2^12618644 is an apocalyptic number.

It is an amenable number.

12618644 is a deficient number, since it is larger than the sum of its proper divisors (9570124).

12618644 is a wasteful number, since it uses less digits than its factorization.

12618644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15166 (or 15164 counting only the distinct ones).

The product of its digits is 9216, while the sum is 32.

The square root of 12618644 is about 3552.2730750887. The cubic root of 12618644 is about 232.8113929860.

The spelling of 12618644 in words is "twelve million, six hundred eighteen thousand, six hundred forty-four".