12644424 has 160 divisors (see below), whose sum is σ = 40656000. Its totient is φ = 3639168.

The previous prime is 12644393. The next prime is 12644459. The reversal of 12644424 is 42444621.

It is a happy number.

12644424 is a `hidden beast` number, since 12 + 644 + 4 + 2 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 160017 + ... + 160095.

It is an arithmetic number, because the mean of its divisors is an integer number (254100).

Almost surely, 2^12644424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12644424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20328000).

12644424 is an abundant number, since it is smaller than the sum of its proper divisors (28011576).

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

12644424 is a wasteful number, since it uses less digits than its factorization.

12644424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129 (or 116 counting only the distinct ones).

The product of its digits is 6144, while the sum is 27.

The square root of 12644424 is about 3555.8998861048. The cubic root of 12644424 is about 232.9698303757.

The spelling of 12644424 in words is "twelve million, six hundred forty-four thousand, four hundred twenty-four".