11808081 has 24 divisors (see below), whose sum is σ = 18330624. Its totient is φ = 7297920.

The previous prime is 11808077. The next prime is 11808091. The reversal of 11808081 is 18080811.

It is not a de Polignac number, because 11808081 - 2² = 11808077 is a prime.

It is a super-2 number, since 2×11808081² = 278861553805122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11808031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10320 + ... + 11406.

It is an arithmetic number, because the mean of its divisors is an integer number (763776).

Almost surely, 2^11808081 is an apocalyptic number.

It is an amenable number.

11808081 is a deficient number, since it is larger than the sum of its proper divisors (6522543).

11808081 is a wasteful number, since it uses less digits than its factorization.

11808081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1181 (or 1178 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 27.

The square root of 11808081 is about 3436.2888411774. The cubic root of 11808081 is about 227.7157700117.

Adding to 11808081 its reverse (18080811), we get a palindrome (29888892).

It can be divided in two parts, 1180 and 8081, that added together give a cube (9261 = 21³).

The spelling of 11808081 in words is "eleven million, eight hundred eight thousand, eighty-one".