285744 has 20 divisors (see below), whose sum is σ = 738296. Its totient is φ = 95232.

The previous prime is 285731. The next prime is 285749. The reversal of 285744 is 447582.

It is not an unprimeable number, because it can be changed into a prime (285749) by changing a digit.

285744 is an untouchable number, because it is not equal to the sum of proper divisors of any 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, 2929 + ... + 3024.

2²⁸⁵⁷⁴⁴ is an apocalyptic number.

285744 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

285744 is an abundant number, since it is smaller than the sum of its proper divisors (452552).

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

285744 is a wasteful number, since it uses less digits than its factorization.

285744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5964 (or 5958 counting only the distinct ones).

The product of its digits is 8960, while the sum is 30.

The square root of 285744 is about 534.5502782714. The cubic root of 285744 is about 65.8656587854.

The spelling of 285744 in words is "two hundred eighty-five thousand, seven hundred forty-four".