11591840 has 48 divisors (see below), whose sum is σ = 29497608. Its totient is φ = 4279296.

The previous prime is 11591837. The next prime is 11591849. The reversal of 11591840 is 4819511.

It can be written as a sum of positive squares in 4 ways, for example, as 3952144 + 7639696 = 1988^2 + 2764^2 .

It is not an unprimeable number, because it can be changed into a prime (11591849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 707 + ... + 4866.

Almost surely, 2^11591840 is an apocalyptic number.

11591840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11591840 is an abundant number, since it is smaller than the sum of its proper divisors (17905768).

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

11591840 is a wasteful number, since it uses less digits than its factorization.

11591840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5601 (or 5593 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 29.

The square root of 11591840 is about 3404.6791331930. The cubic root of 11591840 is about 226.3171468232.

The spelling of 11591840 in words is "eleven million, five hundred ninety-one thousand, eight hundred forty".