320020440439 has 16 divisors (see below), whose sum is σ = 381831155712. Its totient is φ = 262245094848.

The previous prime is 320020440433. The next prime is 320020440457. The reversal of 320020440439 is 934044020023.

It is a cyclic number.

It is not a de Polignac number, because 320020440439 - 2³³ = 311430505847 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 320020440439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320020440433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 177799 + ... + 819544.

It is an arithmetic number, because the mean of its divisors is an integer number (23864447232).

Almost surely, 2^320020440439 is an apocalyptic number.

320020440439 is a deficient number, since it is larger than the sum of its proper divisors (61810715273).

320020440439 is a wasteful number, since it uses less digits than its factorization.

320020440439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999366.

The product of its (nonzero) digits is 20736, while the sum is 31.

The spelling of 320020440439 in words is "three hundred twenty billion, twenty million, four hundred forty thousand, four hundred thirty-nine".