320004305 has 16 divisors (see below), whose sum is σ = 395075664. Its totient is φ = 248647680.

The previous prime is 320004287. The next prime is 320004319. The reversal of 320004305 is 503400023.

It can be written as a sum of positive squares in 8 ways, for example, as 59536 + 319944769 = 244^2 + 17887^2 .

It is not a de Polignac number, because 320004305 - 2²⁰ = 318955729 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139649 + ... + 141921.

It is an arithmetic number, because the mean of its divisors is an integer number (24692229).

Almost surely, 2^320004305 is an apocalyptic number.

It is an amenable number.

320004305 is a deficient number, since it is larger than the sum of its proper divisors (75071359).

320004305 is a wasteful number, since it uses less digits than its factorization.

320004305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3076.

The product of its (nonzero) digits is 360, while the sum is 17.

The square root of 320004305 is about 17888.6641480017. The cubic root of 320004305 is about 683.9934459263.

Adding to 320004305 its reverse (503400023), we get a palindrome (823404328).

The spelling of 320004305 in words is "three hundred twenty million, four thousand, three hundred five".