285088 has 24 divisors (see below), whose sum is σ = 574560. Its totient is φ = 139200.

The previous prime is 285079. The next prime is 285091. The reversal of 285088 is 880582.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1813 + ... + 1963.

It is an arithmetic number, because the mean of its divisors is an integer number (23940).

2²⁸⁵⁰⁸⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 285088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (287280).

285088 is an abundant number, since it is smaller than the sum of its proper divisors (289472).

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

285088 is a wasteful number, since it uses less digits than its factorization.

285088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220 (or 212 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 31.

The square root of 285088 is about 533.9363257918. The cubic root of 285088 is about 65.8152162221.

The spelling of 285088 in words is "two hundred eighty-five thousand, eighty-eight".