285678 has 24 divisors (see below), whose sum is σ = 631800. Its totient is φ = 93264.

The previous prime is 285673. The next prime is 285697. The reversal of 285678 is 876582.

It is a super-2 number, since 2×285678² = 163223839368, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a d-powerful number, because it can be written as 2¹¹ + 8 + 6⁷ + 5⁵ + 7² + 8³ .

Its product of digits (26880) is a multiple of the sum of its prime factors (336).

It is a plaindrome in base 16.

It is a zygodrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285673) by changing a digit.

285678 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 928 + ... + 1196.

It is an arithmetic number, because the mean of its divisors is an integer number (26325).

2²⁸⁵⁶⁷⁸ is an apocalyptic number.

285678 is an abundant number, since it is smaller than the sum of its proper divisors (346122).

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

285678 is a wasteful number, since it uses less digits than its factorization.

285678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336 (or 333 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 285678 is about 534.4885405694. The cubic root of 285678 is about 65.8605872666.

The spelling of 285678 in words is "two hundred eighty-five thousand, six hundred seventy-eight".