287286 has 8 divisors (see below), whose sum is σ = 574584. Its totient is φ = 95760.

The previous prime is 287281. The next prime is 287291. The reversal of 287286 is 682782.

287286 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (287281) and next prime (287291).

It is a sphenic number, since it is the product of 3 distinct primes.

287286 is an admirable number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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 287286.

It is not an unprimeable number, because it can be changed into a prime (287281) by changing a digit.

287286 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, 23935 + ... + 23946.

It is an arithmetic number, because the mean of its divisors is an integer number (71823).

287286 is a Friedman number, since it can be written as (67*8)^2-8-2, using all its digits and the basic arithmetic operations.

2²⁸⁷²⁸⁶ is an apocalyptic number.

287286 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

287286 is a wasteful number, since it uses less digits than its factorization.

287286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47886.

The product of its digits is 10752, while the sum is 33.

The square root of 287286 is about 535.9906715606. The cubic root of 287286 is about 65.9839262969.

The spelling of 287286 in words is "two hundred eighty-seven thousand, two hundred eighty-six".