11918938 has 16 divisors (see below), whose sum is σ = 19011240. Its totient is φ = 5604288.

The previous prime is 11918927. The next prime is 11918941. The reversal of 11918938 is 83981911.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7745089 + 4173849 = 2783^2 + 2043^2 .

It is a super-2 number, since 2×11918938² = 284122166095688, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11918938.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9220 + ... + 10432.

Almost surely, 2^11918938 is an apocalyptic number.

11918938 is a deficient number, since it is larger than the sum of its proper divisors (7092302).

11918938 is an equidigital number, since it uses as much as digits as its factorization.

11918938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1266 (or 1232 counting only the distinct ones).

The product of its digits is 15552, while the sum is 40.

The square root of 11918938 is about 3452.3814968801. The cubic root of 11918938 is about 228.4261676369.

The spelling of 11918938 in words is "eleven million, nine hundred eighteen thousand, nine hundred thirty-eight".