11520220 has 48 divisors (see below), whose sum is σ = 26466048. Its totient is φ = 4193280.

The previous prime is 11520191. The next prime is 11520227. The reversal of 11520220 is 2202511.

It is a self number, because there is not a number n which added to its sum of digits gives 11520220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11520227) 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, 9994 + ... + 11086.

It is an arithmetic number, because the mean of its divisors is an integer number (551376).

Almost surely, 2^11520220 is an apocalyptic number.

11520220 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 11520220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13233024).

11520220 is an abundant number, since it is smaller than the sum of its proper divisors (14945828).

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

11520220 is a wasteful number, since it uses less digits than its factorization.

11520220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1150 (or 1148 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 11520220 is about 3394.1449586015. The cubic root of 11520220 is about 225.8500846162.

Adding to 11520220 its reverse (2202511), we get a palindrome (13722731).

The spelling of 11520220 in words is "eleven million, five hundred twenty thousand, two hundred twenty".