685430 has 8 divisors (see below), whose sum is σ = 1233792. Its totient is φ = 274168.

The previous prime is 685429. The next prime is 685453. The reversal of 685430 is 34586.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 685430.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34262 + ... + 34281.

It is an arithmetic number, because the mean of its divisors is an integer number (154224).

2⁶⁸⁵⁴³⁰ is an apocalyptic number.

685430 is a deficient number, since it is larger than the sum of its proper divisors (548362).

685430 is a wasteful number, since it uses less digits than its factorization.

685430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68550.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 685430 is about 827.9069996080. The cubic root of 685430 is about 88.1700396832.

The spelling of 685430 in words is "six hundred eighty-five thousand, four hundred thirty".