285020 has 12 divisors (see below), whose sum is σ = 598584. Its totient is φ = 114000.

The previous prime is 285007. The next prime is 285023. The reversal of 285020 is 20582.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 285020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285023) by changing a digit.

285020 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, 7106 + ... + 7145.

It is an arithmetic number, because the mean of its divisors is an integer number (49882).

2²⁸⁵⁰²⁰ is an apocalyptic number.

285020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

285020 is an abundant number, since it is smaller than the sum of its proper divisors (313564).

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

285020 is a wasteful number, since it uses less digits than its factorization.

285020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14260 (or 14258 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 285020 is about 533.8726439892. The cubic root of 285020 is about 65.8099829952.

The spelling of 285020 in words is "two hundred eighty-five thousand, twenty".