286866 has 12 divisors (see below), whose sum is σ = 621582. Its totient is φ = 95616.

The previous prime is 286859. The next prime is 286873. The reversal of 286866 is 668682.

It is an interprime number because it is at equal distance from previous prime (286859) and next prime (286873).

It can be written as a sum of positive squares in only one way, i.e., 221841 + 65025 = 471^2 + 255^2 .

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 286866.

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 286866.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7951 + ... + 7986.

2²⁸⁶⁸⁶⁶ is an apocalyptic number.

286866 is an abundant number, since it is smaller than the sum of its proper divisors (334716).

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

286866 is a wasteful number, since it uses less digits than its factorization.

286866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15945 (or 15942 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 286866 is about 535.5987303943. The cubic root of 286866 is about 65.9517553764.

It can be divided in two parts, 2 and 86866, that added together give a palindrome (86868).

The spelling of 286866 in words is "two hundred eighty-six thousand, eight hundred sixty-six".