11918838 has 16 divisors (see below), whose sum is σ = 23892480. Its totient is φ = 3963816.

The previous prime is 11918827. The next prime is 11918839. The reversal of 11918838 is 83881911.

It is a junction number, because it is equal to n+sod(n) for n = 11918796 and 11918805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11918839) 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, 883 + ... + 4961.

It is an arithmetic number, because the mean of its divisors is an integer number (1493280).

Almost surely, 2^11918838 is an apocalyptic number.

11918838 is an abundant number, since it is smaller than the sum of its proper divisors (11973642).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11918838 is a wasteful number, since it uses less digits than its factorization.

11918838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4571.

The product of its digits is 13824, while the sum is 39.

The square root of 11918838 is about 3452.3670140934. The cubic root of 11918838 is about 228.4255288025.

The spelling of 11918838 in words is "eleven million, nine hundred eighteen thousand, eight hundred thirty-eight".