12644022 has 32 divisors (see below), whose sum is σ = 27037152. Its totient is φ = 3928064.

The previous prime is 12644017. The next prime is 12644041. The reversal of 12644022 is 22044621.

It is a self number, because there is not a number n which added to its sum of digits gives 12644022.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 10978 + ... + 12074.

It is an arithmetic number, because the mean of its divisors is an integer number (844911).

Almost surely, 2^12644022 is an apocalyptic number.

12644022 is an abundant number, since it is smaller than the sum of its proper divisors (14393130).

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

12644022 is a wasteful number, since it uses less digits than its factorization.

12644022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1232.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 12644022 is about 3555.8433598796. The cubic root of 12644022 is about 232.9673614385.

Adding to 12644022 its reverse (22044621), we get a palindrome (34688643).

The spelling of 12644022 in words is "twelve million, six hundred forty-four thousand, twenty-two".