287894 has 4 divisors (see below), whose sum is σ = 431844. Its totient is φ = 143946.

The previous prime is 287887. The next prime is 287921. The reversal of 287894 is 498782.

It is a semiprime because it is the product of two primes.

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 287894.

It is an unprimeable number.

287894 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 as a sum of consecutive naturals, namely, 71972 + ... + 71975.

It is an arithmetic number, because the mean of its divisors is an integer number (107961).

2²⁸⁷⁸⁹⁴ is an apocalyptic number.

287894 is a deficient number, since it is larger than the sum of its proper divisors (143950).

287894 is a wasteful number, since it uses less digits than its factorization.

287894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143949.

The product of its digits is 32256, while the sum is 38.

The square root of 287894 is about 536.5575458420. The cubic root of 287894 is about 66.0304420326.

The spelling of 287894 in words is "two hundred eighty-seven thousand, eight hundred ninety-four".