320505344 has 40 divisors (see below), whose sum is σ = 646372320. Its totient is φ = 158754816.

The previous prime is 320505337. The next prime is 320505349. The reversal of 320505344 is 443505023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320505349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52937 + ... + 58679.

It is an arithmetic number, because the mean of its divisors is an integer number (16159308).

Almost surely, 2^320505344 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 320505344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (323186160).

320505344 is an abundant number, since it is smaller than the sum of its proper divisors (325866976).

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

320505344 is an equidigital number, since it uses as much as digits as its factorization.

320505344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5870 (or 5854 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 26.

The square root of 320505344 is about 17902.6630421287. The cubic root of 320505344 is about 684.3502418405.

The spelling of 320505344 in words is "three hundred twenty million, five hundred five thousand, three hundred forty-four".