320528343 has 16 divisors (see below), whose sum is σ = 438389600. Its totient is φ = 208241280.

The previous prime is 320528339. The next prime is 320528389. The reversal of 320528343 is 343825023.

It is not a de Polignac number, because 320528343 - 2² = 320528339 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 320528343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320528333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11913 + ... + 27981.

It is an arithmetic number, because the mean of its divisors is an integer number (27399350).

Almost surely, 2^320528343 is an apocalyptic number.

320528343 is a deficient number, since it is larger than the sum of its proper divisors (117861257).

320528343 is a wasteful number, since it uses less digits than its factorization.

320528343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16242.

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 320528343 is about 17903.3053652112. The cubic root of 320528343 is about 684.3666107768.

The spelling of 320528343 in words is "three hundred twenty million, five hundred twenty-eight thousand, three hundred forty-three".