12218244 has 24 divisors (see below), whose sum is σ = 29749440. Its totient is φ = 3895584.

The previous prime is 12218243. The next prime is 12218299. The reversal of 12218244 is 44281221.

It is not an unprimeable number, because it can be changed into a prime (12218243) 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, 21859 + ... + 22410.

It is an arithmetic number, because the mean of its divisors is an integer number (1239560).

Almost surely, 2^12218244 is an apocalyptic number.

It is an amenable number.

12218244 is an abundant number, since it is smaller than the sum of its proper divisors (17531196).

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

12218244 is a wasteful number, since it uses less digits than its factorization.

12218244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44299 (or 44297 counting only the distinct ones).

The product of its digits is 1024, while the sum is 24.

The square root of 12218244 is about 3495.4604846858. The cubic root of 12218244 is about 230.3224462890.

Adding to 12218244 its reverse (44281221), we get a palindrome (56499465).

The spelling of 12218244 in words is "twelve million, two hundred eighteen thousand, two hundred forty-four".