12644620 has 12 divisors (see below), whose sum is σ = 26553744. Its totient is φ = 5057840.

The previous prime is 12644591. The next prime is 12644669. The reversal of 12644620 is 2644621.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 316096 + ... + 316135.

It is an arithmetic number, because the mean of its divisors is an integer number (2212812).

Almost surely, 2^12644620 is an apocalyptic number.

12644620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12644620 is an abundant number, since it is smaller than the sum of its proper divisors (13909124).

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

12644620 is a wasteful number, since it uses less digits than its factorization.

12644620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632240 (or 632238 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 12644620 is about 3555.9274458290. The cubic root of 12644620 is about 232.9710341171.

Subtracting from 12644620 its reverse (2644621), we obtain a palindrome (9999999).

The spelling of 12644620 in words is "twelve million, six hundred forty-four thousand, six hundred twenty".