809104 has 20 divisors (see below), whose sum is σ = 1595260. Its totient is φ = 397440.

The previous prime is 809101. The next prime is 809141. The reversal of 809104 is 401908.

It can be written as a sum of positive squares in 2 ways, for example, as 200704 + 608400 = 448^2 + 780^2 .

It is not an unprimeable number, because it can be changed into a prime (809101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 562 + ... + 1390.

It is an arithmetic number, because the mean of its divisors is an integer number (79763).

2⁸⁰⁹¹⁰⁴ is an apocalyptic number.

It is an amenable number.

809104 is a deficient number, since it is larger than the sum of its proper divisors (786156).

809104 is a wasteful number, since it uses less digits than its factorization.

809104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 898 (or 892 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 809104 is about 899.5020844890. The cubic root of 809104 is about 93.1825911352.

The spelling of 809104 in words is "eight hundred nine thousand, one hundred four".