12440443 has 8 divisors (see below), whose sum is σ = 12636000. Its totient is φ = 12246528.

The previous prime is 12440431. The next prime is 12440453. The reversal of 12440443 is 34404421.

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

It is a cyclic number.

It is not a de Polignac number, because 12440443 - 2⁵ = 12440411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12440423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27483 + ... + 27931.

It is an arithmetic number, because the mean of its divisors is an integer number (1579500).

Almost surely, 2^12440443 is an apocalyptic number.

12440443 is a deficient number, since it is larger than the sum of its proper divisors (195557).

12440443 is a wasteful number, since it uses less digits than its factorization.

12440443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 12440443 is about 3527.1012177141. The cubic root of 12440443 is about 231.7102692688.

Adding to 12440443 its reverse (34404421), we get a palindrome (46844864).

The spelling of 12440443 in words is "twelve million, four hundred forty thousand, four hundred forty-three".