809930 has 32 divisors (see below), whose sum is σ = 1641600. Its totient is φ = 285120.

The previous prime is 809929. The next prime is 809981. The reversal of 809930 is 39908.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 809893 and 809902.

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 15 ways as a sum of consecutive naturals, for example, 3971 + ... + 4169.

It is an arithmetic number, because the mean of its divisors is an integer number (51300).

2⁸⁰⁹⁹³⁰ is an apocalyptic number.

809930 is an abundant number, since it is smaller than the sum of its proper divisors (831670).

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

809930 is a wasteful number, since it uses less digits than its factorization.

809930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 809930 is about 899.9611102709. The cubic root of 809930 is about 93.2142898386.

The spelling of 809930 in words is "eight hundred nine thousand, nine hundred thirty".