11439818 has 16 divisors (see below), whose sum is σ = 18785256. Its totient is φ = 5192640.

The previous prime is 11439817. The next prime is 11439821. The reversal of 11439818 is 81893411.

It can be written as a sum of positive squares in 4 ways, for example, as 6568969 + 4870849 = 2563^2 + 2207^2 .

It is not an unprimeable number, because it can be changed into a prime (11439811) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2021 + ... + 5192.

Almost surely, 2^11439818 is an apocalyptic number.

11439818 is a deficient number, since it is larger than the sum of its proper divisors (7345438).

11439818 is a wasteful number, since it uses less digits than its factorization.

11439818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7289.

The product of its digits is 6912, while the sum is 35.

The square root of 11439818 is about 3382.2800002365. The cubic root of 11439818 is about 225.3234393572.

The spelling of 11439818 in words is "eleven million, four hundred thirty-nine thousand, eight hundred eighteen".