685370 has 16 divisors (see below), whose sum is σ = 1410048. Its totient is φ = 234960.

The previous prime is 685369. The next prime is 685381. The reversal of 685370 is 73586.

It is a Curzon number.

It is a nialpdrome in base 7.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 685370.

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 7 ways as a sum of consecutive naturals, for example, 4826 + ... + 4965.

It is an arithmetic number, because the mean of its divisors is an integer number (88128).

2⁶⁸⁵³⁷⁰ is an apocalyptic number.

685370 is an abundant number, since it is smaller than the sum of its proper divisors (724678).

It is a weird number, because it is abundant, but not a pseudoperfect number.

685370 is a wasteful number, since it uses less digits than its factorization.

685370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9805.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 685370 is about 827.8707628610. The cubic root of 685370 is about 88.1674669154.

It can be divided in two parts, 6853 and 70, that multiplied together give a triangular number (479710 = T₉₇₉).

The spelling of 685370 in words is "six hundred eighty-five thousand, three hundred seventy".