11566920 has 64 divisors (see below), whose sum is σ = 35562240. Its totient is φ = 3008000.

The previous prime is 11566913. The next prime is 11566931. The reversal of 11566920 is 2966511.

11566920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3745 + ... + 6095.

It is an arithmetic number, because the mean of its divisors is an integer number (555660).

Almost surely, 2^11566920 is an apocalyptic number.

11566920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11566920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17781120).

11566920 is an abundant number, since it is smaller than the sum of its proper divisors (23995320).

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

11566920 is a wasteful number, since it uses less digits than its factorization.

11566920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2406 (or 2402 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 11566920 is about 3401.0174948095. The cubic root of 11566920 is about 226.1548524964.

The spelling of 11566920 in words is "eleven million, five hundred sixty-six thousand, nine hundred twenty".