285534 has 24 divisors (see below), whose sum is σ = 641160. Its totient is φ = 91728.

The previous prime is 285533. The next prime is 285539. The reversal of 285534 is 435582.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 285498 and 285507.

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 285534.

It is not an unprimeable number, because it can be changed into a prime (285533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 249 + ... + 795.

It is an arithmetic number, because the mean of its divisors is an integer number (26715).

2²⁸⁵⁵³⁴ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 285534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (320580).

285534 is an abundant number, since it is smaller than the sum of its proper divisors (355626).

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

285534 is a wasteful number, since it uses less digits than its factorization.

285534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 584 (or 581 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 285534 is about 534.3538153696. The cubic root of 285534 is about 65.8495194227.

The spelling of 285534 in words is "two hundred eighty-five thousand, five hundred thirty-four".