320020440440 has 16 divisors (see below), whose sum is σ = 720045991080. Its totient is φ = 128008176160.

The previous prime is 320020440433. The next prime is 320020440457. The reversal of 320020440440 is 44044020023.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 4000255466 + ... + 4000255545.

Almost surely, 2^320020440440 is an apocalyptic number.

It is an amenable number.

320020440440 is an abundant number, since it is smaller than the sum of its proper divisors (400025550640).

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

320020440440 is a wasteful number, since it uses less digits than its factorization.

320020440440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8000511022 (or 8000511018 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 23.

Adding to 320020440440 its reverse (44044020023), we get a palindrome (364064460463).

The spelling of 320020440440 in words is "three hundred twenty billion, twenty million, four hundred forty thousand, four hundred forty".