320568738 has 32 divisors (see below), whose sum is σ = 736794240. Its totient is φ = 91082880.

The previous prime is 320568679. The next prime is 320568739. The reversal of 320568738 is 837865023.

320568738 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 320568738.

It is not an unprimeable number, because it can be changed into a prime (320568739) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13483 + ... + 28686.

It is an arithmetic number, because the mean of its divisors is an integer number (23024820).

Almost surely, 2^320568738 is an apocalyptic number.

320568738 is an abundant number, since it is smaller than the sum of its proper divisors (416225502).

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

320568738 is a wasteful number, since it uses less digits than its factorization.

320568738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42362.

The product of its (nonzero) digits is 241920, while the sum is 42.

The square root of 320568738 is about 17904.4334733049. The cubic root of 320568738 is about 684.3953589657.

The spelling of 320568738 in words is "three hundred twenty million, five hundred sixty-eight thousand, seven hundred thirty-eight".