287886 has 8 divisors (see below), whose sum is σ = 575784. Its totient is φ = 95960.

The previous prime is 287873. The next prime is 287887. The reversal of 287886 is 688782.

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

287886 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (287887) by changing a digit.

287886 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, 23985 + ... + 23996.

It is an arithmetic number, because the mean of its divisors is an integer number (71973).

2²⁸⁷⁸⁸⁶ is an apocalyptic number.

287886 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.

287886 is a wasteful number, since it uses less digits than its factorization.

287886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47986.

The product of its digits is 43008, while the sum is 39.

The square root of 287886 is about 536.5500908583. The cubic root of 287886 is about 66.0298304088.

The spelling of 287886 in words is "two hundred eighty-seven thousand, eight hundred eighty-six".