286864 has 10 divisors (see below), whose sum is σ = 555830. Its totient is φ = 143424.

The previous prime is 286859. The next prime is 286873. The reversal of 286864 is 468682.

It can be written as a sum of positive squares in only one way, i.e., 250000 + 36864 = 500^2 + 192^2 .

It is a d-powerful number, because it can be written as 2⁹ + 8³ + 8³ + 6⁴ + 6⁷ + 4⁶ .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8949 + ... + 8980.

It is an arithmetic number, because the mean of its divisors is an integer number (55583).

2²⁸⁶⁸⁶⁴ is an apocalyptic number.

It is an amenable number.

286864 is a deficient number, since it is larger than the sum of its proper divisors (268966).

286864 is a wasteful number, since it uses less digits than its factorization.

286864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17937 (or 17931 counting only the distinct ones).

The product of its digits is 18432, while the sum is 34.

The square root of 286864 is about 535.5968633217. The cubic root of 286864 is about 65.9516021064.

The spelling of 286864 in words is "two hundred eighty-six thousand, eight hundred sixty-four".