12644244 has 18 divisors (see below), whose sum is σ = 31961930. Its totient is φ = 4214736.

The previous prime is 12644239. The next prime is 12644267. The reversal of 12644244 is 44244621.

It is a happy number.

12644244 is a `hidden beast` number, since 12 + 644 + 2 + 4 + 4 = 666.

12644244 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 9072144 + 3572100 = 3012^2 + 1890^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

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 5 ways as a sum of consecutive naturals, for example, 175579 + ... + 175650.

Almost surely, 2^12644244 is an apocalyptic number.

It is an amenable number.

12644244 is an abundant number, since it is smaller than the sum of its proper divisors (19317686).

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

12644244 is a wasteful number, since it uses less digits than its factorization.

12644244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351239 (or 351234 counting only the distinct ones).

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

The square root of 12644244 is about 3555.8745759658. The cubic root of 12644244 is about 232.9687248879.

Adding to 12644244 its reverse (44244621), we get a palindrome (56888865).

The spelling of 12644244 in words is "twelve million, six hundred forty-four thousand, two hundred forty-four".