12440456 has 16 divisors (see below), whose sum is σ = 26658240. Its totient is φ = 5331600.

The previous prime is 12440453. The next prime is 12440471. The reversal of 12440456 is 65404421.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (12440453) 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 3 ways as a sum of consecutive naturals, for example, 111020 + ... + 111131.

It is an arithmetic number, because the mean of its divisors is an integer number (1666140).

Almost surely, 2^12440456 is an apocalyptic number.

It is an amenable number.

12440456 is an abundant number, since it is smaller than the sum of its proper divisors (14217784).

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

12440456 is a wasteful number, since it uses less digits than its factorization.

12440456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222164 (or 222160 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 12440456 is about 3527.1030605867. The cubic root of 12440456 is about 231.7103499795.

Adding to 12440456 its reverse (65404421), we get a palindrome (77844877).

The spelling of 12440456 in words is "twelve million, four hundred forty thousand, four hundred fifty-six".