320131324402340 has 192 divisors, whose sum is σ = 763871861733120. Its totient is φ = 111669662269440.

The previous prime is 320131324402289. The next prime is 320131324402363. The reversal of 320131324402340 is 43204423131023.

It is a junction number, because it is equal to n+sod(n) for n = 320131324402297 and 320131324402306.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 250750892 + ... + 252024348.

It is an arithmetic number, because the mean of its divisors is an integer number (3978499279860).

Almost surely, 2^{320131324402340} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320131324402340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (381935930866560).

320131324402340 is an abundant number, since it is smaller than the sum of its proper divisors (443740537330780).

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

320131324402340 is a wasteful number, since it uses less digits than its factorization.

320131324402340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1273950 (or 1273948 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 32.

Adding to 320131324402340 its reverse (43204423131023), we get a palindrome (363335747533363).

The spelling of 320131324402340 in words is "three hundred twenty trillion, one hundred thirty-one billion, three hundred twenty-four million, four hundred two thousand, three hundred forty".