11931808 has 24 divisors (see below), whose sum is σ = 26847072. Its totient is φ = 5113536.

The previous prime is 11931767. The next prime is 11931809. The reversal of 11931808 is 80813911.

It is a self number, because there is not a number n which added to its sum of digits gives 11931808.

It is not an unprimeable number, because it can be changed into a prime (11931809) 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, 26410 + ... + 26857.

It is an arithmetic number, because the mean of its divisors is an integer number (1118628).

Almost surely, 2^11931808 is an apocalyptic number.

It is an amenable number.

11931808 is an abundant number, since it is smaller than the sum of its proper divisors (14915264).

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

11931808 is an equidigital number, since it uses as much as digits as its factorization.

11931808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53284 (or 53276 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 31.

The square root of 11931808 is about 3454.2449247267. The cubic root of 11931808 is about 228.5083558114.

The spelling of 11931808 in words is "eleven million, nine hundred thirty-one thousand, eight hundred eight".