287986 has 8 divisors (see below), whose sum is σ = 434304. Its totient is φ = 143220.

The previous prime is 287977. The next prime is 288007. The reversal of 287986 is 689782.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 391 + ... + 853.

It is an arithmetic number, because the mean of its divisors is an integer number (54288).

2²⁸⁷⁹⁸⁶ is an apocalyptic number.

287986 is a deficient number, since it is larger than the sum of its proper divisors (146318).

287986 is a wasteful number, since it uses less digits than its factorization.

287986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776.

The product of its digits is 48384, while the sum is 40.

The square root of 287986 is about 536.6432707116. The cubic root of 287986 is about 66.0374748915.

The spelling of 287986 in words is "two hundred eighty-seven thousand, nine hundred eighty-six".