287866 has 8 divisors (see below), whose sum is σ = 445824. Its totient is φ = 139260.

The previous prime is 287863. The next prime is 287867. The reversal of 287866 is 668782.

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

It is not an unprimeable number, because it can be changed into a prime (287863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2260 + ... + 2383.

It is an arithmetic number, because the mean of its divisors is an integer number (55728).

2²⁸⁷⁸⁶⁶ is an apocalyptic number.

287866 is a deficient number, since it is larger than the sum of its proper divisors (157958).

287866 is a wasteful number, since it uses less digits than its factorization.

287866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4676.

The product of its digits is 32256, while the sum is 37.

The square root of 287866 is about 536.5314529457. The cubic root of 287866 is about 66.0283012999.

The spelling of 287866 in words is "two hundred eighty-seven thousand, eight hundred sixty-six".