12440144 has 20 divisors (see below), whose sum is σ = 24174420. Its totient is φ = 6201600.

The previous prime is 12440143. The next prime is 12440147. The reversal of 12440144 is 44104421.

It is a happy number.

12440144 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 6190144 + 6250000 = 2488^2 + 2500^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12440143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5594 + ... + 7494.

It is an arithmetic number, because the mean of its divisors is an integer number (1208721).

Almost surely, 2^12440144 is an apocalyptic number.

It is an amenable number.

12440144 is a deficient number, since it is larger than the sum of its proper divisors (11734276).

12440144 is a wasteful number, since it uses less digits than its factorization.

12440144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2318 (or 2312 counting only the distinct ones).

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

The square root of 12440144 is about 3527.0588313778. The cubic root of 12440144 is about 231.7084129060.

Adding to 12440144 its reverse (44104421), we get a palindrome (56544565).

The spelling of 12440144 in words is "twelve million, four hundred forty thousand, one hundred forty-four".