11521808 has 20 divisors (see below), whose sum is σ = 22414860. Its totient is φ = 5737344.

The previous prime is 11521799. The next prime is 11521813. The reversal of 11521808 is 80812511.

It can be written as a sum of positive squares in 2 ways, for example, as 446224 + 11075584 = 668^2 + 3328^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2966 + ... + 5642.

It is an arithmetic number, because the mean of its divisors is an integer number (1120743).

Almost surely, 2^11521808 is an apocalyptic number.

It is an amenable number.

11521808 is a deficient number, since it is larger than the sum of its proper divisors (10893052).

11521808 is a wasteful number, since it uses less digits than its factorization.

11521808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2954 (or 2948 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 26.

The square root of 11521808 is about 3394.3788828002. The cubic root of 11521808 is about 225.8604615435.

The spelling of 11521808 in words is "eleven million, five hundred twenty-one thousand, eight hundred eight".