323216730 has 64 divisors (see below), whose sum is σ = 872611200. Its totient is φ = 86185296.

The previous prime is 323216717. The next prime is 323216731. The reversal of 323216730 is 37612323.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 323216694 and 323216703.

It is not an unprimeable number, because it can be changed into a prime (323216731) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14481 + ... + 29259.

It is an arithmetic number, because the mean of its divisors is an integer number (13634550).

Almost surely, 2^323216730 is an apocalyptic number.

323216730 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 323216730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (436305600).

323216730 is an abundant number, since it is smaller than the sum of its proper divisors (549394470).

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

323216730 is an equidigital number, since it uses as much as digits as its factorization.

323216730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14807 (or 14789 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 27.

The square root of 323216730 is about 17978.2293343922. The cubic root of 323216730 is about 686.2746295917.

The spelling of 323216730 in words is "three hundred twenty-three million, two hundred sixteen thousand, seven hundred thirty".