287104 has 16 divisors (see below), whose sum is σ = 572220. Its totient is φ = 143488.

The previous prime is 287099. The next prime is 287107. The reversal of 287104 is 401782.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (287107) by changing a digit.

287104 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 994 + ... + 1249.

2²⁸⁷¹⁰⁴ is an apocalyptic number.

It is an amenable number.

287104 is a deficient number, since it is larger than the sum of its proper divisors (285116).

287104 is an equidigital number, since it uses as much as digits as its factorization.

287104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2257 (or 2245 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 287104 is about 535.8208655885. The cubic root of 287104 is about 65.9699894170.

Adding to 287104 its reverse (401782), we get a palindrome (688886).

The spelling of 287104 in words is "two hundred eighty-seven thousand, one hundred four".