287828 has 12 divisors (see below), whose sum is σ = 514752. Its totient is φ = 140760.

The previous prime is 287821. The next prime is 287849. The reversal of 287828 is 828782.

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 287828.

It is not an unprimeable number, because it can be changed into a prime (287821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 578 + ... + 953.

It is an arithmetic number, because the mean of its divisors is an integer number (42896).

2²⁸⁷⁸²⁸ is an apocalyptic number.

It is an amenable number.

287828 is a deficient number, since it is larger than the sum of its proper divisors (226924).

287828 is a wasteful number, since it uses less digits than its factorization.

287828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1582 (or 1580 counting only the distinct ones).

The product of its digits is 14336, while the sum is 35.

The square root of 287828 is about 536.4960391280. The cubic root of 287828 is about 66.0253957977.

The spelling of 287828 in words is "two hundred eighty-seven thousand, eight hundred twenty-eight".