284605 has 4 divisors (see below), whose sum is σ = 341532. Its totient is φ = 227680.

The previous prime is 284593. The next prime is 284623. The reversal of 284605 is 506482.

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 190969 + 93636 = 437^2 + 306^2 .

It is not a de Polignac number, because 284605 - 2⁵ = 284573 is a prime.

It is a d-powerful number, because it can be written as 2⁹ + 8 + 6⁷ + 4⁵ + 0 + 5⁵ .

It is a Duffinian number.

284605 is a lucky number.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 284605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28456 + ... + 28465.

It is an arithmetic number, because the mean of its divisors is an integer number (85383).

2²⁸⁴⁶⁰⁵ is an apocalyptic number.

It is an amenable number.

284605 is a deficient number, since it is larger than the sum of its proper divisors (56927).

284605 is an equidigital number, since it uses as much as digits as its factorization.

284605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56926.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 284605 is about 533.4838329322. The cubic root of 284605 is about 65.7780268646.

The spelling of 284605 in words is "two hundred eighty-four thousand, six hundred five".