11808423 has 40 divisors (see below), whose sum is σ = 19950480. Its totient is φ = 6894720.

The previous prime is 11808389. The next prime is 11808449. The reversal of 11808423 is 32480811.

It is not a de Polignac number, because 11808423 - 2¹² = 11804327 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11808473) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 25611 + ... + 26067.

It is an arithmetic number, because the mean of its divisors is an integer number (498762).

Almost surely, 2^11808423 is an apocalyptic number.

11808423 is a deficient number, since it is larger than the sum of its proper divisors (8142057).

11808423 is a wasteful number, since it uses less digits than its factorization.

11808423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509 (or 500 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 11808423 is about 3436.3386038049. The cubic root of 11808423 is about 227.7179684508.

The spelling of 11808423 in words is "eleven million, eight hundred eight thousand, four hundred twenty-three".