12444220 has 24 divisors (see below), whose sum is σ = 26205984. Its totient is φ = 4963776.

The previous prime is 12444193. The next prime is 12444239. The reversal of 12444220 is 2244421.

It is a super-2 number, since 2×12444220² = 309717222816800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9442 + ... + 10678.

It is an arithmetic number, because the mean of its divisors is an integer number (1091916).

Almost surely, 2^12444220 is an apocalyptic number.

12444220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12444220 is an abundant number, since it is smaller than the sum of its proper divisors (13761764).

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

12444220 is a wasteful number, since it uses less digits than its factorization.

12444220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1749 (or 1747 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 12444220 is about 3527.6366025995. The cubic root of 12444220 is about 231.7337164813.

Adding to 12444220 its reverse (2244421), we get a palindrome (14688641).

It can be divided in two parts, 124 and 44220, that added together give a palindrome (44344).

The spelling of 12444220 in words is "twelve million, four hundred forty-four thousand, two hundred twenty".