285318 has 36 divisors (see below), whose sum is σ = 684684. Its totient is φ = 85800.

The previous prime is 285317. The next prime is 285343. The reversal of 285318 is 813582.

It is a happy number.

It is a super-2 number, since 2×285318² = 162812722248, which contains 22 as substring.

It is a Curzon number.

It is a zygodrome in base 5.

It is a junction number, because it is equal to n+sod(n) for n = 285291 and 285300.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 285318.

It is not an unprimeable number, because it can be changed into a prime (285317) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2113 + ... + 2243.

It is an arithmetic number, because the mean of its divisors is an integer number (19019).

2²⁸⁵³¹⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 285318, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (342342).

285318 is an abundant number, since it is smaller than the sum of its proper divisors (399366).

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

285318 is a wasteful number, since it uses less digits than its factorization.

285318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161 (or 147 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 285318 is about 534.1516638559. The cubic root of 285318 is about 65.8329106776.

The spelling of 285318 in words is "two hundred eighty-five thousand, three hundred eighteen".