285838 has 16 divisors (see below), whose sum is σ = 519264. Its totient is φ = 115200.

The previous prime is 285827. The next prime is 285839. The reversal of 285838 is 838582.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a d-powerful number, because it can be written as 2¹⁴ + 8 + 8⁴ + 5⁵ + 3⁴ + 8⁶ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285839) 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, 363 + ... + 838.

It is an arithmetic number, because the mean of its divisors is an integer number (32454).

2²⁸⁵⁸³⁸ is an apocalyptic number.

285838 is a deficient number, since it is larger than the sum of its proper divisors (233426).

285838 is a wasteful number, since it uses less digits than its factorization.

285838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1227.

The product of its digits is 15360, while the sum is 34.

The square root of 285838 is about 534.6381954182. The cubic root of 285838 is about 65.8728805096.

The spelling of 285838 in words is "two hundred eighty-five thousand, eight hundred thirty-eight".