685381298 has 16 divisors (see below), whose sum is σ = 1189097280. Its totient is φ = 290195376.

The previous prime is 685381289. The next prime is 685381349. The reversal of 685381298 is 892183586.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 293753 + ... + 296076.

It is an arithmetic number, because the mean of its divisors is an integer number (74318580).

Almost surely, 2^685381298 is an apocalyptic number.

685381298 is a deficient number, since it is larger than the sum of its proper divisors (503715982).

685381298 is a wasteful number, since it uses less digits than its factorization.

685381298 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589921.

The product of its digits is 829440, while the sum is 50.

The square root of 685381298 is about 26179.7879670558. The cubic root of 685381298 is about 881.6795137908.

The spelling of 685381298 in words is "six hundred eighty-five million, three hundred eighty-one thousand, two hundred ninety-eight".