12440392 has 16 divisors (see below), whose sum is σ = 23390460. Its totient is φ = 6202944.

The previous prime is 12440381. The next prime is 12440411. The reversal of 12440392 is 29304421.

It can be written as a sum of positive squares in 2 ways, for example, as 11655396 + 784996 = 3414^2 + 886^2 .

It is a super-2 number, since 2×12440392² = 309526706227328, which contains 22 as substring.

It is an unprimeable number.

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, 1218 + ... + 5134.

Almost surely, 2^12440392 is an apocalyptic number.

It is an amenable number.

12440392 is a deficient number, since it is larger than the sum of its proper divisors (10950068).

12440392 is a wasteful number, since it uses less digits than its factorization.

12440392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4320 (or 4316 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 12440392 is about 3527.0939879737. The cubic root of 12440392 is about 231.7099526338.

The spelling of 12440392 in words is "twelve million, four hundred forty thousand, three hundred ninety-two".