320131444440 has 64 divisors (see below), whose sum is σ = 960646924800. Its totient is φ = 85345932672.

The previous prime is 320131444427. The next prime is 320131444447. The reversal of 320131444440 is 44444131023.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 320131444398 and 320131444407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320131444447) by changing a digit.

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, 109851 + ... + 807669.

It is an arithmetic number, because the mean of its divisors is an integer number (15010108200).

Almost surely, 2^320131444440 is an apocalyptic number.

320131444440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

320131444440 is an abundant number, since it is smaller than the sum of its proper divisors (640515480360).

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

320131444440 is a wasteful number, since it uses less digits than its factorization.

320131444440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 701656 (or 701652 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 30.

Adding to 320131444440 its reverse (44444131023), we get a palindrome (364575575463).

The spelling of 320131444440 in words is "three hundred twenty billion, one hundred thirty-one million, four hundred forty-four thousand, four hundred forty".