12644236 has 48 divisors (see below), whose sum is σ = 25458048. Its totient is φ = 5443200.

The previous prime is 12644213. The next prime is 12644237. The reversal of 12644236 is 63244621.

12644236 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

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

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77491 + ... + 77653.

It is an arithmetic number, because the mean of its divisors is an integer number (530376).

Almost surely, 2^12644236 is an apocalyptic number.

It is an amenable number.

12644236 is an abundant number, since it is smaller than the sum of its proper divisors (12813812).

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

12644236 is a wasteful number, since it uses less digits than its factorization.

12644236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262 (or 260 counting only the distinct ones).

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

The square root of 12644236 is about 3555.8734510666. The cubic root of 12644236 is about 232.9686757549.

Adding to 12644236 its reverse (63244621), we get a palindrome (75888857).

It can be divided in two parts, 12644 and 236, that added together give a triangular number (12880 = T₁₆₀).

The spelling of 12644236 in words is "twelve million, six hundred forty-four thousand, two hundred thirty-six".