685322228 has 24 divisors (see below), whose sum is σ = 1226316672. Its totient is φ = 334963904.

The previous prime is 685322203. The next prime is 685322243. The reversal of 685322228 is 822223586.

It is a junction number, because it is equal to n+sod(n) for n = 685322191 and 685322200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 204575 + ... + 207897.

It is an arithmetic number, because the mean of its divisors is an integer number (51096528).

Almost surely, 2^685322228 is an apocalyptic number.

It is an amenable number.

685322228 is a deficient number, since it is larger than the sum of its proper divisors (540994444).

685322228 is a wasteful number, since it uses less digits than its factorization.

685322228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4471 (or 4469 counting only the distinct ones).

The product of its digits is 92160, while the sum is 38.

The square root of 685322228 is about 26178.6597823494. The cubic root of 685322228 is about 881.6541837031.

The spelling of 685322228 in words is "six hundred eighty-five million, three hundred twenty-two thousand, two hundred twenty-eight".