811806 has 8 divisors (see below), whose sum is σ = 1623624. Its totient is φ = 270600.

The previous prime is 811799. The next prime is 811819. The reversal of 811806 is 608118.

811806 = 449² + 450² + ... + 452².

811806 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

811806 is an admirable number.

It is a plaindrome in base 13.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 811806.

It is an unprimeable number.

811806 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 in 3 ways as a sum of consecutive naturals, for example, 67645 + ... + 67656.

It is an arithmetic number, because the mean of its divisors is an integer number (202953).

2⁸¹¹⁸⁰⁶ is an apocalyptic number.

811806 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

811806 is a wasteful number, since it uses less digits than its factorization.

811806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135306.

The product of its (nonzero) digits is 384, while the sum is 24.

The square root of 811806 is about 901.0027746905. The cubic root of 811806 is about 93.2862035295.

The spelling of 811806 in words is "eight hundred eleven thousand, eight hundred six".