285918 has 8 divisors (see below), whose sum is σ = 571848. Its totient is φ = 95304.

The previous prime is 285871. The next prime is 285937. The reversal of 285918 is 819582.

It is a happy number.

285918 is nontrivially palindromic in base 5.

It is a sphenic number, since it is the product of 3 distinct primes.

285918 is an admirable number.

It is an Ulam number.

It is a plaindrome in base 16.

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 285918.

It is an unprimeable number.

285918 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23821 + ... + 23832.

It is an arithmetic number, because the mean of its divisors is an integer number (71481).

2²⁸⁵⁹¹⁸ is an apocalyptic number.

285918 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

285918 is a wasteful number, since it uses less digits than its factorization.

285918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47658.

The product of its digits is 5760, while the sum is 33.

The square root of 285918 is about 534.7130071356. The cubic root of 285918 is about 65.8790254109.

The spelling of 285918 in words is "two hundred eighty-five thousand, nine hundred eighteen".