12440224 has 12 divisors (see below), whose sum is σ = 24491754. Its totient is φ = 6220096.

The previous prime is 12440221. The next prime is 12440227. The reversal of 12440224 is 42204421.

12440224 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12440221) and next prime (12440227).

It can be written as a sum of positive squares in only one way, i.e., 9412624 + 3027600 = 3068^2 + 1740^2 .

It is not an unprimeable number, because it can be changed into a prime (12440221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194347 + ... + 194410.

Almost surely, 2^12440224 is an apocalyptic number.

It is an amenable number.

12440224 is a deficient number, since it is larger than the sum of its proper divisors (12051530).

12440224 is an equidigital number, since it uses as much as digits as its factorization.

12440224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388767 (or 388759 counting only the distinct ones).

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

The square root of 12440224 is about 3527.0701722535. The cubic root of 12440224 is about 231.7089095946.

Adding to 12440224 its reverse (42204421), we get a palindrome (54644645).

The spelling of 12440224 in words is "twelve million, four hundred forty thousand, two hundred twenty-four".