287888 has 20 divisors (see below), whose sum is σ = 587760. Its totient is φ = 136224.

The previous prime is 287887. The next prime is 287921. The reversal of 287888 is 888782.

It is not an unprimeable number, because it can be changed into a prime (287887) 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, 170 + ... + 777.

It is an arithmetic number, because the mean of its divisors is an integer number (29388).

2²⁸⁷⁸⁸⁸ is an apocalyptic number.

It is an amenable number.

287888 is an abundant number, since it is smaller than the sum of its proper divisors (299872).

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

287888 is a wasteful number, since it uses less digits than its factorization.

287888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 974 (or 968 counting only the distinct ones).

The product of its digits is 57344, while the sum is 41.

The square root of 287888 is about 536.5519546139. The cubic root of 287888 is about 66.0299833158.

The spelling of 287888 in words is "two hundred eighty-seven thousand, eight hundred eighty-eight".