320304040443 has 8 divisors (see below), whose sum is σ = 474524504400. Its totient is φ = 213536026944.

The previous prime is 320304040339. The next prime is 320304040471. The reversal of 320304040443 is 344040403023.

It is not a de Polignac number, because 320304040443 - 2¹² = 320304036347 is a prime.

It is a super-2 number, since 2×320304040443² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 11863112609 = 320304040443 / (3 + 2 + 0 + 3 + 0 + 4 + 0 + 4 + 0 + 4 + 4 + 3).

It is not an unprimeable number, because it can be changed into a prime (320304040643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5931556278 + ... + 5931556331.

It is an arithmetic number, because the mean of its divisors is an integer number (59315563050).

Almost surely, 2^320304040443 is an apocalyptic number.

320304040443 is a deficient number, since it is larger than the sum of its proper divisors (154220463957).

320304040443 is a wasteful number, since it uses less digits than its factorization.

320304040443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11863112618 (or 11863112612 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 27.

Adding to 320304040443 its reverse (344040403023), we get a palindrome (664344443466).

The spelling of 320304040443 in words is "three hundred twenty billion, three hundred four million, forty thousand, four hundred forty-three".