12644632 has 64 divisors (see below), whose sum is σ = 31852800. Its totient is φ = 4544640.

The previous prime is 12644591. The next prime is 12644669. The reversal of 12644632 is 23644621.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 12644632.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7219 + ... + 8797.

It is an arithmetic number, because the mean of its divisors is an integer number (497700).

Almost surely, 2^12644632 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 12644632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15926400).

12644632 is an abundant number, since it is smaller than the sum of its proper divisors (19208168).

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

12644632 is a wasteful number, since it uses less digits than its factorization.

12644632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1616 (or 1612 counting only the distinct ones).

The product of its digits is 6912, while the sum is 28.

The square root of 12644632 is about 3555.9291331521. The cubic root of 12644632 is about 232.9711078151.

The spelling of 12644632 in words is "twelve million, six hundred forty-four thousand, six hundred thirty-two".