287982 has 16 divisors (see below), whose sum is σ = 640080. Its totient is φ = 95976.

The previous prime is 287977. The next prime is 288007. The reversal of 287982 is 289782.

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 287982.

It is an unprimeable number.

287982 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 7 ways as a sum of consecutive naturals, for example, 2613 + ... + 2720.

It is an arithmetic number, because the mean of its divisors is an integer number (40005).

2²⁸⁷⁹⁸² is an apocalyptic number.

287982 is an abundant number, since it is smaller than the sum of its proper divisors (352098).

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

287982 is a wasteful number, since it uses less digits than its factorization.

287982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5344 (or 5338 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 287982 is about 536.6395438281. The cubic root of 287982 is about 66.0371691462.

The spelling of 287982 in words is "two hundred eighty-seven thousand, nine hundred eighty-two".