685690222 has 12 divisors (see below), whose sum is σ = 1196459640. Its totient is φ = 293867196.

The previous prime is 685690219. The next prime is 685690231. The reversal of 685690222 is 222096586.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3498322 + ... + 3498517.

It is an arithmetic number, because the mean of its divisors is an integer number (99704970).

Almost surely, 2^685690222 is an apocalyptic number.

685690222 is a deficient number, since it is larger than the sum of its proper divisors (510769418).

685690222 is a wasteful number, since it uses less digits than its factorization.

685690222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6996855 (or 6996848 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 685690222 is about 26185.6873501537. The cubic root of 685690222 is about 881.8119612575.

The spelling of 685690222 in words is "six hundred eighty-five million, six hundred ninety thousand, two hundred twenty-two".