12444222 has 32 divisors (see below), whose sum is σ = 28680192. Its totient is φ = 3525984.

The previous prime is 12444193. The next prime is 12444239. The reversal of 12444222 is 22244421.

It is a super-2 number, since 2×12444222² = 309717322370568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4168 + ... + 6500.

It is an arithmetic number, because the mean of its divisors is an integer number (896256).

Almost surely, 2^12444222 is an apocalyptic number.

12444222 is an abundant number, since it is smaller than the sum of its proper divisors (16235970).

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

12444222 is a wasteful number, since it uses less digits than its factorization.

12444222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2472.

The product of its digits is 1024, while the sum is 21.

The square root of 12444222 is about 3527.6368860754. The cubic root of 12444222 is about 231.7337288958.

Adding to 12444222 its reverse (22244421), we get a palindrome (34688643).

The spelling of 12444222 in words is "twelve million, four hundred forty-four thousand, two hundred twenty-two".