288789 has 4 divisors (see below), whose sum is σ = 385056. Its totient is φ = 192524.

The previous prime is 288773. The next prime is 288803. The reversal of 288789 is 987882.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 288789 - 2⁴ = 288773 is a prime.

It is an Ulam number.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 288789.

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 288789.

It is not an unprimeable number, because it can be changed into a prime (288089) 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, 48129 + ... + 48134.

It is an arithmetic number, because the mean of its divisors is an integer number (96264).

2²⁸⁸⁷⁸⁹ is an apocalyptic number.

It is an amenable number.

288789 is a deficient number, since it is larger than the sum of its proper divisors (96267).

288789 is an equidigital number, since it uses as much as digits as its factorization.

288789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96266.

The product of its digits is 64512, while the sum is 42.

The square root of 288789 is about 537.3909191641. The cubic root of 288789 is about 66.0987960228.

The spelling of 288789 in words is "two hundred eighty-eight thousand, seven hundred eighty-nine".