808805 has 4 divisors (see below), whose sum is σ = 970572. Its totient is φ = 647040.

The previous prime is 808793. The next prime is 808837. The reversal of 808805 is 508808.

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

It can be written as a sum of positive squares in 2 ways, for example, as 334084 + 474721 = 578^2 + 689^2 .

It is not a de Polignac number, because 808805 - 2⁴ = 808789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 80876 + ... + 80885.

It is an arithmetic number, because the mean of its divisors is an integer number (242643).

2⁸⁰⁸⁸⁰⁵ is an apocalyptic number.

It is an amenable number.

808805 is a deficient number, since it is larger than the sum of its proper divisors (161767).

808805 is a wasteful number, since it uses less digits than its factorization.

808805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161766.

The product of its (nonzero) digits is 2560, while the sum is 29.

The square root of 808805 is about 899.3358660701. The cubic root of 808805 is about 93.1711113471.

The spelling of 808805 in words is "eight hundred eight thousand, eight hundred five".