284393 has 4 divisors (see below), whose sum is σ = 301140. Its totient is φ = 267648.

The previous prime is 284387. The next prime is 284407. The reversal of 284393 is 393482.

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

It can be written as a sum of positive squares in 2 ways, for example, as 204304 + 80089 = 452^2 + 283^2 .

It is not a de Polignac number, because 284393 - 2⁴ = 284377 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (284093) 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, 8348 + ... + 8381.

It is an arithmetic number, because the mean of its divisors is an integer number (75285).

2²⁸⁴³⁹³ is an apocalyptic number.

It is an amenable number.

284393 is a deficient number, since it is larger than the sum of its proper divisors (16747).

284393 is a wasteful number, since it uses less digits than its factorization.

284393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16746.

The product of its digits is 5184, while the sum is 29.

The square root of 284393 is about 533.2851019858. The cubic root of 284393 is about 65.7616902980.

The spelling of 284393 in words is "two hundred eighty-four thousand, three hundred ninety-three".