282385 has 4 divisors (see below), whose sum is σ = 338868. Its totient is φ = 225904.

The previous prime is 282383. The next prime is 282389. The reversal of 282385 is 583282.

282385 is nontrivially palindromic in base 4.

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 43264 + 239121 = 208^2 + 489^2 .

It is a cyclic number.

It is not a de Polignac number, because 282385 - 2¹ = 282383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (282383) 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, 28234 + ... + 28243.

It is an arithmetic number, because the mean of its divisors is an integer number (84717).

2²⁸²³⁸⁵ is an apocalyptic number.

It is an amenable number.

282385 is a deficient number, since it is larger than the sum of its proper divisors (56483).

282385 is an equidigital number, since it uses as much as digits as its factorization.

282385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56482.

The product of its digits is 3840, while the sum is 28.

The square root of 282385 is about 531.3990967249. The cubic root of 282385 is about 65.6065511254.

Adding to 282385 its product of digits (3840), we get a square (286225 = 535²).

The spelling of 282385 in words is "two hundred eighty-two thousand, three hundred eighty-five".