685969628 has 12 divisors (see below), whose sum is σ = 1203123600. Its totient is φ = 342220032.

The previous prime is 685969607. The next prime is 685969633. The reversal of 685969628 is 826969586.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 189176 + ... + 192767.

It is an arithmetic number, because the mean of its divisors is an integer number (100260300).

Almost surely, 2^685969628 is an apocalyptic number.

It is an amenable number.

685969628 is a deficient number, since it is larger than the sum of its proper divisors (517153972).

685969628 is a wasteful number, since it uses less digits than its factorization.

685969628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382396 (or 382394 counting only the distinct ones).

The product of its digits is 11197440, while the sum is 59.

The square root of 685969628 is about 26191.0218968256. The cubic root of 685969628 is about 881.9317189785.

The spelling of 685969628 in words is "six hundred eighty-five million, nine hundred sixty-nine thousand, six hundred twenty-eight".