11808811 has 4 divisors (see below), whose sum is σ = 13495792. Its totient is φ = 10121832.

The previous prime is 11808793. The next prime is 11808833. The reversal of 11808811 is 11880811.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 11808811 - 2⁹ = 11808299 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11808811.

It is not an unprimeable number, because it can be changed into a prime (11808871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 843480 + ... + 843493.

It is an arithmetic number, because the mean of its divisors is an integer number (3373948).

Almost surely, 2^11808811 is an apocalyptic number.

11808811 is a deficient number, since it is larger than the sum of its proper divisors (1686981).

11808811 is an equidigital number, since it uses as much as digits as its factorization.

11808811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1686980.

The product of its (nonzero) digits is 512, while the sum is 28.

The square root of 11808811 is about 3436.3950587789. The cubic root of 11808811 is about 227.7204625351.

The spelling of 11808811 in words is "eleven million, eight hundred eight thousand, eight hundred eleven".