804688218 has 12 divisors (see below), whose sum is σ = 1743491178. Its totient is φ = 268229400.

The previous prime is 804688207. The next prime is 804688219. The reversal of 804688218 is 812886408.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 509088969 + 295599249 = 22563^2 + 17193^2 .

It is not an unprimeable number, because it can be changed into a prime (804688219) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22352433 + ... + 22352468.

Almost surely, 2^804688218 is an apocalyptic number.

804688218 is an abundant number, since it is smaller than the sum of its proper divisors (938802960).

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

804688218 is a wasteful number, since it uses less digits than its factorization.

804688218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44704909 (or 44704906 counting only the distinct ones).

The product of its (nonzero) digits is 196608, while the sum is 45.

The square root of 804688218 is about 28367.0269503168. The cubic root of 804688218 is about 930.1276342342.

The spelling of 804688218 in words is "eight hundred four million, six hundred eighty-eight thousand, two hundred eighteen".