12440818 has 8 divisors (see below), whose sum is σ = 20096748. Its totient is φ = 5741904.

The previous prime is 12440809. The next prime is 12440819. The reversal of 12440818 is 81804421.

It can be written as a sum of positive squares in 2 ways, for example, as 12439729 + 1089 = 3527^2 + 33^2 .

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

It is not an unprimeable number, because it can be changed into a prime (12440819) 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, 239221 + ... + 239272.

Almost surely, 2^12440818 is an apocalyptic number.

12440818 is a deficient number, since it is larger than the sum of its proper divisors (7655930).

12440818 is a wasteful number, since it uses less digits than its factorization.

12440818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478508.

The product of its (nonzero) digits is 2048, while the sum is 28.

The square root of 12440818 is about 3527.1543771148. The cubic root of 12440818 is about 231.7125974409.

The spelling of 12440818 in words is "twelve million, four hundred forty thousand, eight hundred eighteen".