12440056 has 64 divisors (see below), whose sum is σ = 26671680. Its totient is φ = 5406720.

The previous prime is 12440053. The next prime is 12440059. The reversal of 12440056 is 65004421.

It is an interprime number because it is at equal distance from previous prime (12440053) and next prime (12440059).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12440053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128200 + ... + 128296.

It is an arithmetic number, because the mean of its divisors is an integer number (416745).

Almost surely, 2^12440056 is an apocalyptic number.

12440056 is the 2231-st heptagonal number.

It is an amenable number.

12440056 is an abundant number, since it is smaller than the sum of its proper divisors (14231624).

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

12440056 is a wasteful number, since it uses less digits than its factorization.

12440056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184 (or 180 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 12440056 is about 3527.0463563724. The cubic root of 12440056 is about 231.7078665461.

Adding to 12440056 its reverse (65004421), we get a palindrome (77444477).

The spelling of 12440056 in words is "twelve million, four hundred forty thousand, fifty-six".