809018 has 8 divisors (see below), whose sum is σ = 1386912. Its totient is φ = 346716.

The previous prime is 808993. The next prime is 809023. The reversal of 809018 is 810908.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

809018 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28880 + ... + 28907.

It is an arithmetic number, because the mean of its divisors is an integer number (173364).

2⁸⁰⁹⁰¹⁸ is an apocalyptic number.

809018 is a deficient number, since it is larger than the sum of its proper divisors (577894).

809018 is a wasteful number, since it uses less digits than its factorization.

809018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57796.

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 809018 is about 899.4542789937. The cubic root of 809018 is about 93.1792895461.

The spelling of 809018 in words is "eight hundred nine thousand, eighteen".