286878 has 16 divisors (see below), whose sum is σ = 579600. Its totient is φ = 94656.

The previous prime is 286873. The next prime is 286927. The reversal of 286878 is 878682.

It is a Curzon number.

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 286878.

It is not an unprimeable number, because it can be changed into a prime (286873) 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, 648 + ... + 996.

It is an arithmetic number, because the mean of its divisors is an integer number (36225).

2²⁸⁶⁸⁷⁸ is an apocalyptic number.

286878 is an abundant number, since it is smaller than the sum of its proper divisors (292722).

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

286878 is a wasteful number, since it uses less digits than its factorization.

286878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491.

The product of its digits is 43008, while the sum is 39.

The square root of 286878 is about 535.6099326936. The cubic root of 286878 is about 65.9526749812.

The spelling of 286878 in words is "two hundred eighty-six thousand, eight hundred seventy-eight".