809380218 has 16 divisors (see below), whose sum is σ = 1629626400. Its totient is φ = 267982416.

The previous prime is 809380211. The next prime is 809380237. The reversal of 809380218 is 812083908.

809380218 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (809380211) 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, 451780 + ... + 453567.

It is an arithmetic number, because the mean of its divisors is an integer number (101851650).

Almost surely, 2^809380218 is an apocalyptic number.

809380218 is an abundant number, since it is smaller than the sum of its proper divisors (820246182).

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

809380218 is a wasteful number, since it uses less digits than its factorization.

809380218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 905501.

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 809380218 is about 28449.6083980079. The cubic root of 809380218 is about 931.9319371971.

The spelling of 809380218 in words is "eight hundred nine million, three hundred eighty thousand, two hundred eighteen".