685284 has 12 divisors (see below), whose sum is σ = 1599024. Its totient is φ = 228424.

The previous prime is 685271. The next prime is 685297. The reversal of 685284 is 482586.

685284 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (685271) and next prime (685297).

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×685284² = 939228321312, which contains 22 as substring.

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, 28542 + ... + 28565.

It is an arithmetic number, because the mean of its divisors is an integer number (133252).

2⁶⁸⁵²⁸⁴ is an apocalyptic number.

It is an amenable number.

685284 is an abundant number, since it is smaller than the sum of its proper divisors (913740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

685284 is a wasteful number, since it uses less digits than its factorization.

685284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57114 (or 57112 counting only the distinct ones).

The product of its digits is 15360, while the sum is 33.

The square root of 685284 is about 827.8188207573. The cubic root of 685284 is about 88.1637790197.

It can be divided in two parts, 685 and 284, that added together give a palindrome (969).

The spelling of 685284 in words is "six hundred eighty-five thousand, two hundred eighty-four".