285233 has 8 divisors (see below), whose sum is σ = 316008. Its totient is φ = 255744.

The previous prime is 285227. The next prime is 285251. The reversal of 285233 is 332582.

It can be written as a sum of positive squares in 4 ways, for example, as 61504 + 223729 = 248^2 + 473^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-285233 is a prime.

It is a d-powerful number, because it can be written as 2⁴ + 8⁶ + 2¹⁴ + 5³ + 3 + 3⁸ .

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 285199 and 285208.

It is not an unprimeable number, because it can be changed into a prime (285283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185 + ... + 777.

It is an arithmetic number, because the mean of its divisors is an integer number (39501).

2²⁸⁵²³³ is an apocalyptic number.

It is an amenable number.

285233 is a deficient number, since it is larger than the sum of its proper divisors (30775).

285233 is a wasteful number, since it uses less digits than its factorization.

285233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643.

The product of its digits is 1440, while the sum is 23.

The square root of 285233 is about 534.0720925119. The cubic root of 285233 is about 65.8263725304.

The spelling of 285233 in words is "two hundred eighty-five thousand, two hundred thirty-three".