285080 has 16 divisors (see below), whose sum is σ = 641520. Its totient is φ = 114016.

The previous prime is 285079. The next prime is 285091. The reversal of 285080 is 80582.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3524 + ... + 3603.

It is an arithmetic number, because the mean of its divisors is an integer number (40095).

2²⁸⁵⁰⁸⁰ is an apocalyptic number.

285080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

285080 is an abundant number, since it is smaller than the sum of its proper divisors (356440).

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

285080 is a wasteful number, since it uses less digits than its factorization.

285080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7138 (or 7134 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 285080 is about 533.9288342092. The cubic root of 285080 is about 65.8146005916.

The spelling of 285080 in words is "two hundred eighty-five thousand, eighty".