285923 has 12 divisors (see below), whose sum is σ = 335160. Its totient is φ = 242880.

The previous prime is 285871. The next prime is 285937. The reversal of 285923 is 329582.

It is not a de Polignac number, because 285923 - 2⁸ = 285667 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2⁷ + 8⁶ + 9² + 5⁴ + 2¹⁴ + 3⁸ .

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 285923.

It is not an unprimeable number, because it can be changed into a prime (285953) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1988 + ... + 2126.

It is an arithmetic number, because the mean of its divisors is an integer number (27930).

2²⁸⁵⁹²³ is an apocalyptic number.

285923 is a deficient number, since it is larger than the sum of its proper divisors (49237).

285923 is a wasteful number, since it uses less digits than its factorization.

285923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178 (or 167 counting only the distinct ones).

The product of its digits is 4320, while the sum is 29.

The square root of 285923 is about 534.7176825204. The cubic root of 285923 is about 65.8794094292.

It can be divided in two parts, 2859 and 23, that added together give a palindrome (2882).

The spelling of 285923 in words is "two hundred eighty-five thousand, nine hundred twenty-three".