320104400420 has 48 divisors (see below), whose sum is σ = 768592610688. Its totient is φ = 109701216000.

The previous prime is 320104400401. The next prime is 320104400443. The reversal of 320104400420 is 24004401023.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 320104400392 and 320104400401.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 192737 + ... + 823016.

It is an arithmetic number, because the mean of its divisors is an integer number (16012346056).

Almost surely, 2^320104400420 is an apocalyptic number.

It is an amenable number.

320104400420 is an abundant number, since it is smaller than the sum of its proper divisors (448488210268).

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

320104400420 is a wasteful number, since it uses less digits than its factorization.

320104400420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018020 (or 1018018 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 320104400420 its reverse (24004401023), we get a palindrome (344108801443).

The spelling of 320104400420 in words is "three hundred twenty billion, one hundred four million, four hundred thousand, four hundred twenty".