320708723328 has 512 divisors, whose sum is σ = 1165263667200. Its totient is φ = 84815216640.

The previous prime is 320708723287. The next prime is 320708723333. The reversal of 320708723328 is 823327807023.

320708723328 is a `hidden beast` number, since 320 + 70 + 8 + 7 + 233 + 28 = 666.

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 63 ways as a sum of consecutive naturals, for example, 17239600 + ... + 17258192.

It is an arithmetic number, because the mean of its divisors is an integer number (2275905600).

Almost surely, 2^320708723328 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 320708723328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (582631833600).

320708723328 is an abundant number, since it is smaller than the sum of its proper divisors (844554943872).

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

320708723328 is a wasteful number, since it uses less digits than its factorization.

320708723328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18677 (or 18659 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 45.

The spelling of 320708723328 in words is "three hundred twenty billion, seven hundred eight million, seven hundred twenty-three thousand, three hundred twenty-eight".