304289 has 4 divisors (see below), whose sum is σ = 307524. Its totient is φ = 301056.

The previous prime is 304279. The next prime is 304301. The reversal of 304289 is 982403.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 250000 + 54289 = 500^2 + 233^2 .

It is a cyclic number.

It is not a de Polignac number, because 304289 - 2⁸ = 304033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (304259) 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, 1472 + ... + 1665.

It is an arithmetic number, because the mean of its divisors is an integer number (76881).

2³⁰⁴²⁸⁹ is an apocalyptic number.

It is an amenable number.

304289 is a deficient number, since it is larger than the sum of its proper divisors (3235).

304289 is an equidigital number, since it uses as much as digits as its factorization.

304289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3234.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 304289 is about 551.6239661219. The cubic root of 304289 is about 67.2608086440.

The spelling of 304289 in words is "three hundred four thousand, two hundred eighty-nine".