12644238 has 16 divisors (see below), whose sum is σ = 25441920. Its totient is φ = 4189176.

The previous prime is 12644237. The next prime is 12644239. The reversal of 12644238 is 83244621.

It is an interprime number because it is at equal distance from previous prime (12644237) and next prime (12644239).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12644237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5308 + ... + 7311.

It is an arithmetic number, because the mean of its divisors is an integer number (1590120).

Almost surely, 2^12644238 is an apocalyptic number.

12644238 is an abundant number, since it is smaller than the sum of its proper divisors (12797682).

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

12644238 is a wasteful number, since it uses less digits than its factorization.

12644238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12791.

The product of its digits is 9216, while the sum is 30.

The square root of 12644238 is about 3555.8737322914. The cubic root of 12644238 is about 232.9686880381.

Adding to 12644238 its reverse (83244621), we get a palindrome (95888859).

The spelling of 12644238 in words is "twelve million, six hundred forty-four thousand, two hundred thirty-eight".