685885198 has 8 divisors (see below), whose sum is σ = 1032831792. Its totient is φ = 341607936.

The previous prime is 685885181. The next prime is 685885271. The reversal of 685885198 is 891588586.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 666690 + ... + 667717.

It is an arithmetic number, because the mean of its divisors is an integer number (129103974).

Almost surely, 2^685885198 is an apocalyptic number.

685885198 is a deficient number, since it is larger than the sum of its proper divisors (346946594).

685885198 is a wasteful number, since it uses less digits than its factorization.

685885198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1334666.

The product of its digits is 5529600, while the sum is 58.

The square root of 685885198 is about 26189.4100353559. The cubic root of 685885198 is about 881.8955344075.

The spelling of 685885198 in words is "six hundred eighty-five million, eight hundred eighty-five thousand, one hundred ninety-eight".