286868 has 12 divisors (see below), whose sum is σ = 519540. Its totient is φ = 138432.

The previous prime is 286859. The next prime is 286873. The reversal of 286868 is 868682.

It can be written as a sum of positive squares in 2 ways, for example, as 183184 + 103684 = 428^2 + 322^2 .

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 286868.

It is an unprimeable number.

286868 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 3 ways as a sum of consecutive naturals, for example, 1121 + ... + 1352.

It is an arithmetic number, because the mean of its divisors is an integer number (43295).

2²⁸⁶⁸⁶⁸ is an apocalyptic number.

It is an amenable number.

286868 is a deficient number, since it is larger than the sum of its proper divisors (232672).

286868 is a wasteful number, since it uses less digits than its factorization.

286868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2506 (or 2504 counting only the distinct ones).

The product of its digits is 36864, while the sum is 38.

The square root of 286868 is about 535.6005974605. The cubic root of 286868 is about 65.9519086456.

The spelling of 286868 in words is "two hundred eighty-six thousand, eight hundred sixty-eight".