800805 has 16 divisors (see below), whose sum is σ = 1292544. Its totient is φ = 423360.

The previous prime is 800801. The next prime is 800861. The reversal of 800805 is 508008.

It is not a de Polignac number, because 800805 - 2² = 800801 is a prime.

800805 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (800801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2820 + ... + 3090.

It is an arithmetic number, because the mean of its divisors is an integer number (80784).

2⁸⁰⁰⁸⁰⁵ is an apocalyptic number.

It is an amenable number.

800805 is a deficient number, since it is larger than the sum of its proper divisors (491739).

800805 is a wasteful number, since it uses less digits than its factorization.

800805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 800805 is about 894.8770865320. The cubic root of 800805 is about 92.8629035592.

The spelling of 800805 in words is "eight hundred thousand, eight hundred five".