285750 has 48 divisors (see below), whose sum is σ = 778752. Its totient is φ = 75600.

The previous prime is 285749. The next prime is 285757. The reversal of 285750 is 57582.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285757) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2187 + ... + 2313.

It is an arithmetic number, because the mean of its divisors is an integer number (16224).

2²⁸⁵⁷⁵⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 285750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (389376).

285750 is an abundant number, since it is smaller than the sum of its proper divisors (493002).

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

285750 is a wasteful number, since it uses less digits than its factorization.

285750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150 (or 137 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 285750 is about 534.5558904362. Note that the first 3 decimals coincide. The cubic root of 285750 is about 65.8661197938.

It can be divided in two parts, 285 and 750, that added together give a triangular number (1035 = T₄₅).

The spelling of 285750 in words is "two hundred eighty-five thousand, seven hundred fifty".