685078 has 16 divisors (see below), whose sum is σ = 1096416. Its totient is φ = 320320.

The previous prime is 685073. The next prime is 685081. The reversal of 685078 is 870586.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2298 + ... + 2578.

It is an arithmetic number, because the mean of its divisors is an integer number (68526).

2⁶⁸⁵⁰⁷⁸ is an apocalyptic number.

685078 is a deficient number, since it is larger than the sum of its proper divisors (411338).

685078 is a wasteful number, since it uses less digits than its factorization.

685078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 685078 is about 827.6943880443. The cubic root of 685078 is about 88.1549439680.

The spelling of 685078 in words is "six hundred eighty-five thousand, seventy-eight".