304520305 has 4 divisors (see below), whose sum is σ = 365424372. Its totient is φ = 243616240.

The previous prime is 304520297. The next prime is 304520317. The reversal of 304520305 is 503025403.

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 228342321 + 76177984 = 15111^2 + 8728^2 .

It is not a de Polignac number, because 304520305 - 2³ = 304520297 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30452026 + ... + 30452035.

It is an arithmetic number, because the mean of its divisors is an integer number (91356093).

Almost surely, 2^304520305 is an apocalyptic number.

It is an amenable number.

304520305 is a deficient number, since it is larger than the sum of its proper divisors (60904067).

304520305 is an equidigital number, since it uses as much as digits as its factorization.

304520305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60904066.

The product of its (nonzero) digits is 1800, while the sum is 22.

The square root of 304520305 is about 17450.5101644622. The cubic root of 304520305 is about 672.7784707449.

Adding to 304520305 its reverse (503025403), we get a palindrome (807545708).

The spelling of 304520305 in words is "three hundred four million, five hundred twenty thousand, three hundred five".