320304443423240 has 32 divisors (see below), whose sum is σ = 720690156109080. Its totient is φ = 128120860319232.

The previous prime is 320304443423231. The next prime is 320304443423243. The reversal of 320304443423240 is 42324344403023.

It can be written as a sum of positive squares in 4 ways, for example, as 141814896863236 + 178489546560004 = 11908606^2 + 13359998^2 .

It is a junction number, because it is equal to n+sod(n) for n = 320304443423194 and 320304443423203.

It is not an unprimeable number, because it can be changed into a prime (320304443423243) 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 7 ways as a sum of consecutive naturals, for example, 22985669 + ... + 34189908.

Almost surely, 2^{320304443423240} is an apocalyptic number.

It is an amenable number.

320304443423240 is an abundant number, since it is smaller than the sum of its proper divisors (400385712685840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

320304443423240 is a wasteful number, since it uses less digits than its factorization.

320304443423240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57315641 (or 57315637 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 38.

Adding to 320304443423240 its reverse (42324344403023), we get a palindrome (362628787826263).

The spelling of 320304443423240 in words is "three hundred twenty trillion, three hundred four billion, four hundred forty-three million, four hundred twenty-three thousand, two hundred forty".