285512 has 16 divisors (see below), whose sum is σ = 542700. Its totient is φ = 140800.

The previous prime is 285497. The next prime is 285517. The reversal of 285512 is 215582.

It can be written as a sum of positive squares in 2 ways, for example, as 276676 + 8836 = 526^2 + 94^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 285512.

It is not an unprimeable number, because it can be changed into a prime (285517) by changing a digit.

285512 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 512 + ... + 912.

2²⁸⁵⁵¹² is an apocalyptic number.

It is an amenable number.

285512 is a deficient number, since it is larger than the sum of its proper divisors (257188).

285512 is a wasteful number, since it uses less digits than its factorization.

285512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496 (or 492 counting only the distinct ones).

The product of its digits is 800, while the sum is 23.

The square root of 285512 is about 534.3332293616. Note that the first 3 decimals coincide. The cubic root of 285512 is about 65.8478281744.

It can be divided in two parts, 285 and 512, that added together give a palindrome (797).

The spelling of 285512 in words is "two hundred eighty-five thousand, five hundred twelve".