285258 has 8 divisors (see below), whose sum is σ = 570528. Its totient is φ = 95084.

The previous prime is 285251. The next prime is 285281. The reversal of 285258 is 852582.

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

285258 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (285251) by changing a digit.

285258 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, 23766 + ... + 23777.

It is an arithmetic number, because the mean of its divisors is an integer number (71316).

2²⁸⁵²⁵⁸ is an apocalyptic number.

285258 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

285258 is a wasteful number, since it uses less digits than its factorization.

285258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47548.

The product of its digits is 6400, while the sum is 30.

The square root of 285258 is about 534.0954970789. The cubic root of 285258 is about 65.8282956497.

The spelling of 285258 in words is "two hundred eighty-five thousand, two hundred fifty-eight".