12440432 has 20 divisors (see below), whose sum is σ = 24197856. Its totient is φ = 6195840.

The previous prime is 12440431. The next prime is 12440453. The reversal of 12440432 is 23404421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12440431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3113 + ... + 5879.

Almost surely, 2^12440432 is an apocalyptic number.

It is an amenable number.

12440432 is a deficient number, since it is larger than the sum of its proper divisors (11757424).

12440432 is a wasteful number, since it uses less digits than its factorization.

12440432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3056 (or 3050 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 12440432 is about 3527.0996583595. The cubic root of 12440432 is about 231.7102009750.

Adding to 12440432 its reverse (23404421), we get a palindrome (35844853).

The spelling of 12440432 in words is "twelve million, four hundred forty thousand, four hundred thirty-two".