12440438 has 8 divisors (see below), whose sum is σ = 18698040. Its totient is φ = 6207760.

The previous prime is 12440431. The next prime is 12440453. The reversal of 12440438 is 83404421.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 4928 + ... + 7011.

It is an arithmetic number, because the mean of its divisors is an integer number (2337255).

Almost surely, 2^12440438 is an apocalyptic number.

12440438 is a deficient number, since it is larger than the sum of its proper divisors (6257602).

12440438 is a wasteful number, since it uses less digits than its factorization.

12440438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12462.

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 12440438 is about 3527.1005089166. The cubic root of 12440438 is about 231.7102382262.

Adding to 12440438 its reverse (83404421), we get a palindrome (95844859).

The spelling of 12440438 in words is "twelve million, four hundred forty thousand, four hundred thirty-eight".