730320 has 80 divisors (see below), whose sum is σ = 2410560. Its totient is φ = 182272.

The previous prime is 730297. The next prime is 730321. The reversal of 730320 is 23037.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 730320.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 730320.

It is not an unprimeable number, because it can be changed into a prime (730321) by changing a digit.

730320 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3991 + ... + 4169.

It is an arithmetic number, because the mean of its divisors is an integer number (30132).

2⁷³⁰³²⁰ 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 730320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1205280).

730320 is an abundant number, since it is smaller than the sum of its proper divisors (1680240).

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

730320 is a wasteful number, since it uses less digits than its factorization.

730320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212 (or 206 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 15.

The square root of 730320 is about 854.5876198495. The cubic root of 730320 is about 90.0542882343.

Adding to 730320 its reverse (23037), we get a palindrome (753357).

The spelling of 730320 in words is "seven hundred thirty thousand, three hundred twenty".