11808520 has 64 divisors (see below), whose sum is σ = 27993600. Its totient is φ = 4477440.

The previous prime is 11808509. The next prime is 11808521. The reversal of 11808520 is 2580811.

It is a super-2 number, since 2×11808520² = 278882289180800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11808521) 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, 110307 + ... + 110413.

It is an arithmetic number, because the mean of its divisors is an integer number (437400).

Almost surely, 2^11808520 is an apocalyptic number.

11808520 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 11808520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13996800).

11808520 is an abundant number, since it is smaller than the sum of its proper divisors (16185080).

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

11808520 is a wasteful number, since it uses less digits than its factorization.

11808520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238 (or 234 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 25.

The square root of 11808520 is about 3436.3527176354. The cubic root of 11808520 is about 227.7185919770.

The spelling of 11808520 in words is "eleven million, eight hundred eight thousand, five hundred twenty".