11806 has 4 divisors (see below), whose sum is σ = 17712. Its totient is φ = 5902.

The previous prime is 11801. The next prime is 11807. The reversal of 11806 is 60811.

11806 is nontrivially palindromic in base 7.

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

It is a self number, because there is not a number n which added to its sum of digits gives 11806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11801) by changing a digit.

11806 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2950 + ... + 2953.

It is an arithmetic number, because the mean of its divisors is an integer number (4428).

2¹¹⁸⁰⁶ is an apocalyptic number.

11806 is a deficient number, since it is larger than the sum of its proper divisors (5906).

11806 is an equidigital number, since it uses as much as digits as its factorization.

11806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5905.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 11806 is about 108.6554186408. The cubic root of 11806 is about 22.7702392045.

The spelling of 11806 in words is "eleven thousand, eight hundred six".