320420343040 has 72 divisors (see below), whose sum is σ = 877150713600. Its totient is φ = 109858400256.

The previous prime is 320420342987. The next prime is 320420343043. The reversal of 320420343040 is 40343024023.

It is a junction number, because it is equal to n+sod(n) for n = 320420342996 and 320420343014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320420343043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17871640 + ... + 17889559.

It is an arithmetic number, because the mean of its divisors is an integer number (12182648800).

Almost surely, 2^320420343040 is an apocalyptic number.

It is an amenable number.

320420343040 is an abundant number, since it is smaller than the sum of its proper divisors (556730370560).

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

320420343040 is an equidigital number, since it uses as much as digits as its factorization.

320420343040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35761227 (or 35761213 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 25.

Adding to 320420343040 its reverse (40343024023), we get a palindrome (360763367063).

The spelling of 320420343040 in words is "three hundred twenty billion, four hundred twenty million, three hundred forty-three thousand, forty".