284389 has 4 divisors (see below), whose sum is σ = 325024. Its totient is φ = 243756.

The previous prime is 284387. The next prime is 284407. The reversal of 284389 is 983482.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 284389 - 2¹ = 284387 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (284387) 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, 20307 + ... + 20320.

It is an arithmetic number, because the mean of its divisors is an integer number (81256).

2²⁸⁴³⁸⁹ is an apocalyptic number.

It is an amenable number.

284389 is a deficient number, since it is larger than the sum of its proper divisors (40635).

284389 is an equidigital number, since it uses as much as digits as its factorization.

284389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40634.

The product of its digits is 13824, while the sum is 34.

The square root of 284389 is about 533.2813516335. The cubic root of 284389 is about 65.7613819829.

The spelling of 284389 in words is "two hundred eighty-four thousand, three hundred eighty-nine".