11163920 has 40 divisors (see below), whose sum is σ = 26455896. Its totient is φ = 4379648.

The previous prime is 11163907. The next prime is 11163949. The reversal of 11163920 is 2936111.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 692224 + 10471696 = 832^2 + 3236^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2924 + ... + 5556.

Almost surely, 2^11163920 is an apocalyptic number.

11163920 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 11163920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13227948).

11163920 is an abundant number, since it is smaller than the sum of its proper divisors (15291976).

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

11163920 is a wasteful number, since it uses less digits than its factorization.

11163920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2699 (or 2693 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 11163920 is about 3341.2452768392. The cubic root of 11163920 is about 223.4972782009.

The spelling of 11163920 in words is "eleven million, one hundred sixty-three thousand, nine hundred twenty".