685644322 has 12 divisors (see below), whose sum is σ = 1130463558. Its totient is φ = 311656400.

The previous prime is 685644313. The next prime is 685644343. The reversal of 685644322 is 223446586.

It can be written as a sum of positive squares in only one way, i.e., 493239681 + 192404641 = 22209^2 + 13871^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1416379 + ... + 1416862.

Almost surely, 2^685644322 is an apocalyptic number.

685644322 is a deficient number, since it is larger than the sum of its proper divisors (444819236).

685644322 is a wasteful number, since it uses less digits than its factorization.

685644322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2833265 (or 2833254 counting only the distinct ones).

The product of its digits is 276480, while the sum is 40.

The square root of 685644322 is about 26184.8109025061. The cubic root of 685644322 is about 881.7922846986.

The spelling of 685644322 in words is "six hundred eighty-five million, six hundred forty-four thousand, three hundred twenty-two".