284987 has 4 divisors (see below), whose sum is σ = 286056. Its totient is φ = 283920.

The previous prime is 284969. The next prime is 284989. The reversal of 284987 is 789482.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 284987 - 2⁸ = 284731 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 284987.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 284987.

It is not an unprimeable number, because it can be changed into a prime (284989) 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, 248 + ... + 794.

It is an arithmetic number, because the mean of its divisors is an integer number (71514).

2²⁸⁴⁹⁸⁷ is an apocalyptic number.

284987 is a deficient number, since it is larger than the sum of its proper divisors (1069).

284987 is an equidigital number, since it uses as much as digits as its factorization.

284987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1068.

The product of its digits is 32256, while the sum is 38.

The square root of 284987 is about 533.8417368472. The cubic root of 284987 is about 65.8074430410.

The spelling of 284987 in words is "two hundred eighty-four thousand, nine hundred eighty-seven".