11591720 has 32 divisors (see below), whose sum is σ = 29808000. Its totient is φ = 3974208.

The previous prime is 11591719. The next prime is 11591731. The reversal of 11591720 is 2719511.

It is a self number, because there is not a number n which added to its sum of digits gives 11591720.

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, 20420 + ... + 20979.

It is an arithmetic number, because the mean of its divisors is an integer number (931500).

Almost surely, 2^11591720 is an apocalyptic number.

11591720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11591720 is an abundant number, since it is smaller than the sum of its proper divisors (18216280).

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

11591720 is a wasteful number, since it uses less digits than its factorization.

11591720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41417 (or 41413 counting only the distinct ones).

The product of its (nonzero) digits is 630, while the sum is 26.

The square root of 11591720 is about 3404.6615103414. The cubic root of 11591720 is about 226.3163658672.

The spelling of 11591720 in words is "eleven million, five hundred ninety-one thousand, seven hundred twenty".