12440872 has 24 divisors (see below), whose sum is σ = 24784110. Its totient is φ = 5853440.

The previous prime is 12440867. The next prime is 12440873. The reversal of 12440872 is 27804421.

It can be written as a sum of positive squares in 3 ways, for example, as 12013156 + 427716 = 3466^2 + 654^2 .

It is a super-2 number, since 2×12440872² = 309550592240768, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12440872.

It is not an unprimeable number, because it can be changed into a prime (12440873) 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 5 ways as a sum of consecutive naturals, for example, 379 + ... + 5002.

Almost surely, 2^12440872 is an apocalyptic number.

It is an amenable number.

12440872 is a deficient number, since it is larger than the sum of its proper divisors (12343238).

12440872 is a wasteful number, since it uses less digits than its factorization.

12440872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5421 (or 5400 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 12440872 is about 3527.1620320025. The cubic root of 12440872 is about 231.7129326938.

The spelling of 12440872 in words is "twelve million, four hundred forty thousand, eight hundred seventy-two".