12444140 has 24 divisors (see below), whose sum is σ = 26257392. Its totient is φ = 4953920.

The previous prime is 12444139. The next prime is 12444163. The reversal of 12444140 is 4144421.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 3170 + ... + 5910.

It is an arithmetic number, because the mean of its divisors is an integer number (1094058).

Almost surely, 2^12444140 is an apocalyptic number.

12444140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12444140 is an abundant number, since it is smaller than the sum of its proper divisors (13813252).

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

12444140 is a wasteful number, since it uses less digits than its factorization.

12444140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2977 (or 2975 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 12444140 is about 3527.6252635449. The cubic root of 12444140 is about 231.7332198990.

Adding to 12444140 its reverse (4144421), we get a palindrome (16588561).

The spelling of 12444140 in words is "twelve million, four hundred forty-four thousand, one hundred forty".