285897 has 8 divisors (see below), whose sum is σ = 384256. Its totient is φ = 189072.

The previous prime is 285871. The next prime is 285937. The reversal of 285897 is 798582.

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

It is not a de Polignac number, because 285897 - 2⁸ = 285641 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 285897.

It is not an unprimeable number, because it can be changed into a prime (285827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168 + ... + 774.

It is an arithmetic number, because the mean of its divisors is an integer number (48032).

2²⁸⁵⁸⁹⁷ is an apocalyptic number.

It is an amenable number.

285897 is a deficient number, since it is larger than the sum of its proper divisors (98359).

285897 is a wasteful number, since it uses less digits than its factorization.

285897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 767.

The product of its digits is 40320, while the sum is 39.

The square root of 285897 is about 534.6933700730. The cubic root of 285897 is about 65.8774124853.

The spelling of 285897 in words is "two hundred eighty-five thousand, eight hundred ninety-seven".