287956 has 12 divisors (see below), whose sum is σ = 507892. Its totient is φ = 142848.

The previous prime is 287939. The next prime is 287977. The reversal of 287956 is 659782.

It can be written as a sum of positive squares in 2 ways, for example, as 111556 + 176400 = 334^2 + 420^2 .

It is a congruent number.

It is an unprimeable number.

287956 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, 586 + ... + 958.

2²⁸⁷⁹⁵⁶ is an apocalyptic number.

It is an amenable number.

287956 is a deficient number, since it is larger than the sum of its proper divisors (219936).

287956 is a wasteful number, since it uses less digits than its factorization.

287956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570 (or 568 counting only the distinct ones).

The product of its digits is 30240, while the sum is 37.

The square root of 287956 is about 536.6153184545. The cubic root of 287956 is about 66.0351817326.

The spelling of 287956 in words is "two hundred eighty-seven thousand, nine hundred fifty-six".