287830 has 16 divisors (see below), whose sum is σ = 524880. Its totient is φ = 113632.

The previous prime is 287821. The next prime is 287849. The reversal of 287830 is 38782.

It is a happy number.

287830 is nontrivially palindromic in base 13.

It is a super-2 number, since 2×287830² = 165692217800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 936 + ... + 1204.

It is an arithmetic number, because the mean of its divisors is an integer number (32805).

2²⁸⁷⁸³⁰ is an apocalyptic number.

287830 is a deficient number, since it is larger than the sum of its proper divisors (237050).

287830 is a wasteful number, since it uses less digits than its factorization.

287830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 287830 is about 536.4979030714. The cubic root of 287830 is about 66.0255487252.

The spelling of 287830 in words is "two hundred eighty-seven thousand, eight hundred thirty".