11808439 has 4 divisors (see below), whose sum is σ = 12127624. Its totient is φ = 11489256.

The previous prime is 11808389. The next prime is 11808449. The reversal of 11808439 is 93480811.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 11808439 - 2⁷ = 11808311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11808449) 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, 159537 + ... + 159610.

It is an arithmetic number, because the mean of its divisors is an integer number (3031906).

Almost surely, 2^11808439 is an apocalyptic number.

11808439 is a deficient number, since it is larger than the sum of its proper divisors (319185).

11808439 is an equidigital number, since it uses as much as digits as its factorization.

11808439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319184.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 11808439 is about 3436.3409318634. The cubic root of 11808439 is about 227.7180713008.

The spelling of 11808439 in words is "eleven million, eight hundred eight thousand, four hundred thirty-nine".