287256 has 16 divisors (see below), whose sum is σ = 718200. Its totient is φ = 95744.

The previous prime is 287251. The next prime is 287257. The reversal of 287256 is 652782.

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 287256.

It is not an unprimeable number, because it can be changed into a prime (287251) by changing a digit.

287256 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, 5961 + ... + 6008.

2²⁸⁷²⁵⁶ is an apocalyptic number.

It is an amenable number.

287256 is an abundant number, since it is smaller than the sum of its proper divisors (430944).

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

287256 is a wasteful number, since it uses less digits than its factorization.

287256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11978 (or 11974 counting only the distinct ones).

The product of its digits is 6720, while the sum is 30.

The square root of 287256 is about 535.9626852683. The cubic root of 287256 is about 65.9816294143.

The spelling of 287256 in words is "two hundred eighty-seven thousand, two hundred fifty-six".