11855872 has 48 divisors (see below), whose sum is σ = 27125280. Its totient is φ = 5074944.

The previous prime is 11855869. The next prime is 11855881. The reversal of 11855872 is 27855811.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13923 + ... + 14749.

It is an arithmetic number, because the mean of its divisors is an integer number (565110).

Almost surely, 2^11855872 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 11855872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13562640).

11855872 is an abundant number, since it is smaller than the sum of its proper divisors (15269408).

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

11855872 is an frugal number, since it uses more digits than its factorization.

11855872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856 (or 836 counting only the distinct ones).

The product of its digits is 22400, while the sum is 37.

The square root of 11855872 is about 3443.2356875474. The cubic root of 11855872 is about 228.0225688134.

The spelling of 11855872 in words is "eleven million, eight hundred fifty-five thousand, eight hundred seventy-two".