12644568 has 48 divisors (see below), whose sum is σ = 34819200. Its totient is φ = 4144320.

The previous prime is 12644563. The next prime is 12644579. The reversal of 12644568 is 86544621.

12644568 is a `hidden beast` number, since 1 + 2 + 644 + 5 + 6 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12644561) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2953 + ... + 5831.

It is an arithmetic number, because the mean of its divisors is an integer number (725400).

Almost surely, 2^12644568 is an apocalyptic number.

12644568 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12644568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17409600).

12644568 is an abundant number, since it is smaller than the sum of its proper divisors (22174632).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12644568 is a wasteful number, since it uses less digits than its factorization.

12644568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2952 (or 2945 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 12644568 is about 3555.9201340863. The cubic root of 12644568 is about 232.9707147583.

It can be divided in two parts, 1264 and 4568, that added together give a cube (5832 = 18³).

The spelling of 12644568 in words is "twelve million, six hundred forty-four thousand, five hundred sixty-eight".