809204 has 24 divisors (see below), whose sum is σ = 1578528. Its totient is φ = 359840.

The previous prime is 809203. The next prime is 809213. The reversal of 809204 is 402908.

809204 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×809204² = 1309622227232, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 809204.

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 809204.

It is not an unprimeable number, because it can be changed into a prime (809201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2159 + ... + 2505.

It is an arithmetic number, because the mean of its divisors is an integer number (65772).

2⁸⁰⁹²⁰⁴ is an apocalyptic number.

It is an amenable number.

809204 is a deficient number, since it is larger than the sum of its proper divisors (769324).

809204 is a wasteful number, since it uses less digits than its factorization.

809204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415 (or 413 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 809204 is about 899.5576690796. The cubic root of 809204 is about 93.1864298981.

The spelling of 809204 in words is "eight hundred nine thousand, two hundred four".