285836 has 12 divisors (see below), whose sum is σ = 526680. Its totient is φ = 135360.

The previous prime is 285827. The next prime is 285839. The reversal of 285836 is 638582.

It is a d-powerful number, because it can be written as 2¹⁰ + 8³ + 8⁴ + 5² + 3⁵ + 6⁷ .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 285836.

It is not an unprimeable number, because it can be changed into a prime (285839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1805 + ... + 1956.

It is an arithmetic number, because the mean of its divisors is an integer number (43890).

2²⁸⁵⁸³⁶ is an apocalyptic number.

It is an amenable number.

285836 is a deficient number, since it is larger than the sum of its proper divisors (240844).

285836 is a wasteful number, since it uses less digits than its factorization.

285836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3784 (or 3782 counting only the distinct ones).

The product of its digits is 11520, while the sum is 32.

The square root of 285836 is about 534.6363249911. The cubic root of 285836 is about 65.8727268724.

The spelling of 285836 in words is "two hundred eighty-five thousand, eight hundred thirty-six".