287966 has 16 divisors (see below), whose sum is σ = 502656. Its totient is φ = 121176.

The previous prime is 287939. The next prime is 287977. The reversal of 287966 is 669782.

287966 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

287966 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, 785 + ... + 1091.

It is an arithmetic number, because the mean of its divisors is an integer number (31416).

2²⁸⁷⁹⁶⁶ is an apocalyptic number.

287966 is a deficient number, since it is larger than the sum of its proper divisors (214690).

287966 is a wasteful number, since it uses less digits than its factorization.

287966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383.

The product of its digits is 36288, while the sum is 38.

The square root of 287966 is about 536.6246360353. The cubic root of 287966 is about 66.0359461366.

The spelling of 287966 in words is "two hundred eighty-seven thousand, nine hundred sixty-six".