287958 has 16 divisors (see below), whose sum is σ = 628416. Its totient is φ = 87240.

The previous prime is 287939. The next prime is 287977. The reversal of 287958 is 859782.

It is an interprime number because it is at equal distance from previous prime (287939) and next prime (287977).

It is a congruent number.

It is an unprimeable number.

287958 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 7 ways as a sum of consecutive naturals, for example, 2116 + ... + 2247.

It is an arithmetic number, because the mean of its divisors is an integer number (39276).

2²⁸⁷⁹⁵⁸ is an apocalyptic number.

287958 is an abundant number, since it is smaller than the sum of its proper divisors (340458).

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

287958 is a wasteful number, since it uses less digits than its factorization.

287958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4379.

The product of its digits is 40320, while the sum is 39.

The square root of 287958 is about 536.6171819836. The cubic root of 287958 is about 66.0353346148.

The spelling of 287958 in words is "two hundred eighty-seven thousand, nine hundred fifty-eight".