323399720 has 64 divisors (see below), whose sum is σ = 837216000. Its totient is φ = 110131200.

The previous prime is 323399707. The next prime is 323399723. The reversal of 323399720 is 27993323.

It is not an unprimeable number, because it can be changed into a prime (323399723) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 38456 + ... + 46104.

It is an arithmetic number, because the mean of its divisors is an integer number (13081500).

Almost surely, 2^323399720 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 323399720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (418608000).

323399720 is an abundant number, since it is smaller than the sum of its proper divisors (513816280).

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

323399720 is a wasteful number, since it uses less digits than its factorization.

323399720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7818 (or 7814 counting only the distinct ones).

The product of its (nonzero) digits is 61236, while the sum is 38.

The square root of 323399720 is about 17983.3178251401. The cubic root of 323399720 is about 686.4041172191.

The spelling of 323399720 in words is "three hundred twenty-three million, three hundred ninety-nine thousand, seven hundred twenty".