685928 has 16 divisors (see below), whose sum is σ = 1296000. Its totient is φ = 340336.

The previous prime is 685907. The next prime is 685939. The reversal of 685928 is 829586.

It is a junction number, because it is equal to n+sod(n) for n = 685891 and 685900.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1193 + ... + 1671.

It is an arithmetic number, because the mean of its divisors is an integer number (81000).

2⁶⁸⁵⁹²⁸ is an apocalyptic number.

It is an amenable number.

685928 is a deficient number, since it is larger than the sum of its proper divisors (610072).

685928 is a wasteful number, since it uses less digits than its factorization.

685928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664 (or 660 counting only the distinct ones).

The product of its digits is 34560, while the sum is 38.

The square root of 685928 is about 828.2077034174. The cubic root of 685928 is about 88.1913878637.

The spelling of 685928 in words is "six hundred eighty-five thousand, nine hundred twenty-eight".