11918904 has 64 divisors (see below), whose sum is σ = 31933440. Its totient is φ = 3694080.

The previous prime is 11918903. The next prime is 11918927. The reversal of 11918904 is 40981911.

11918904 = T₁₆₁ + T₁₆₂ + ... + T₄₂₂.

It is a super-2 number, since 2×11918904² = 284120545122432, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11918903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53337 + ... + 53559.

It is an arithmetic number, because the mean of its divisors is an integer number (498960).

Almost surely, 2^11918904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11918904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15966720).

11918904 is an abundant number, since it is smaller than the sum of its proper divisors (20014536).

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

11918904 is a wasteful number, since it uses less digits than its factorization.

11918904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380 (or 376 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 33.

The square root of 11918904 is about 3452.3765727394. The cubic root of 11918904 is about 228.4259504336.

The spelling of 11918904 in words is "eleven million, nine hundred eighteen thousand, nine hundred four".