320005345 has 8 divisors (see below), whose sum is σ = 418916160. Its totient is φ = 232731120.

The previous prime is 320005339. The next prime is 320005373. The reversal of 320005345 is 543500023.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 320005345 - 2³ = 320005337 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 2909085 + ... + 2909194.

It is an arithmetic number, because the mean of its divisors is an integer number (52364520).

Almost surely, 2^320005345 is an apocalyptic number.

It is an amenable number.

320005345 is a deficient number, since it is larger than the sum of its proper divisors (98910815).

320005345 is a wasteful number, since it uses less digits than its factorization.

320005345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5818295.

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

The square root of 320005345 is about 17888.6932166662. The cubic root of 320005345 is about 683.9941869084.

Adding to 320005345 its reverse (543500023), we get a palindrome (863505368).

The spelling of 320005345 in words is "three hundred twenty million, five thousand, three hundred forty-five".