284287 has 4 divisors (see below), whose sum is σ = 294120. Its totient is φ = 274456.

The previous prime is 284269. The next prime is 284293. The reversal of 284287 is 782482.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 284287 - 2⁷ = 284159 is a prime.

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

It is a Duffinian number.

284287 is a lucky number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (284227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4873 + ... + 4930.

It is an arithmetic number, because the mean of its divisors is an integer number (73530).

2²⁸⁴²⁸⁷ is an apocalyptic number.

284287 is a deficient number, since it is larger than the sum of its proper divisors (9833).

284287 is an equidigital number, since it uses as much as digits as its factorization.

284287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9832.

The product of its digits is 7168, while the sum is 31.

The square root of 284287 is about 533.1857087357. The cubic root of 284287 is about 65.7535189700.

The spelling of 284287 in words is "two hundred eighty-four thousand, two hundred eighty-seven".