287930 has 8 divisors (see below), whose sum is σ = 518292. Its totient is φ = 115168.

The previous prime is 287921. The next prime is 287933. The reversal of 287930 is 39782.

287930 is nontrivially palindromic in base 15.

It can be written as a sum of positive squares in 2 ways, for example, as 277729 + 10201 = 527^2 + 101^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 287893 and 287902.

It is not an unprimeable number, because it can be changed into a prime (287933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14387 + ... + 14406.

2²⁸⁷⁹³⁰ is an apocalyptic number.

287930 is a deficient number, since it is larger than the sum of its proper divisors (230362).

287930 is a wasteful number, since it uses less digits than its factorization.

287930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28800.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 287930 is about 536.5910919872. The cubic root of 287930 is about 66.0331941993.

The spelling of 287930 in words is "two hundred eighty-seven thousand, nine hundred thirty".