320706816 has 72 divisors (see below), whose sum is σ = 869762880. Its totient is φ = 104871936.

The previous prime is 320706773. The next prime is 320706839. The reversal of 320706816 is 618607023.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36765 + ... + 44643.

It is an arithmetic number, because the mean of its divisors is an integer number (12080040).

Almost surely, 2^320706816 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 320706816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (434881440).

320706816 is an abundant number, since it is smaller than the sum of its proper divisors (549056064).

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

320706816 is an equidigital number, since it uses as much as digits as its factorization.

320706816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7951 (or 7937 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 320706816 is about 17908.2890305020. The cubic root of 320706816 is about 684.4936076577.

The spelling of 320706816 in words is "three hundred twenty million, seven hundred six thousand, eight hundred sixteen".