11808855 has 16 divisors (see below), whose sum is σ = 20993760. Its totient is φ = 6297984.

The previous prime is 11808833. The next prime is 11808857. The reversal of 11808855 is 55880811.

11808855 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11808855 - 2¹² = 11804759 is a prime.

It is a super-2 number, since 2×11808855² = 278898112822050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11808857) 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 15 ways as a sum of consecutive naturals, for example, 43602 + ... + 43871.

It is an arithmetic number, because the mean of its divisors is an integer number (1312110).

Almost surely, 2^11808855 is an apocalyptic number.

11808855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11808855 is a deficient number, since it is larger than the sum of its proper divisors (9184905).

11808855 is an equidigital number, since it uses as much as digits as its factorization.

11808855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87487 (or 87481 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 36.

The square root of 11808855 is about 3436.4014608308. The cubic root of 11808855 is about 227.7207453659.

The spelling of 11808855 in words is "eleven million, eight hundred eight thousand, eight hundred fifty-five".