720730752 has 128 divisors (see below), whose sum is σ = 2218508160. Its totient is φ = 203046912.

The previous prime is 720730741. The next prime is 720730757. The reversal of 720730752 is 257037027.

720730752 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (720730757) 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, 194388 + ... + 198060.

It is an arithmetic number, because the mean of its divisors is an integer number (17332095).

Almost surely, 2^720730752 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 720730752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1109254080).

720730752 is an abundant number, since it is smaller than the sum of its proper divisors (1497777408).

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

720730752 is a wasteful number, since it uses less digits than its factorization.

720730752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3770 (or 3758 counting only the distinct ones).

The product of its (nonzero) digits is 20580, while the sum is 33.

The square root of 720730752 is about 26846.4290362797. The cubic root of 720730752 is about 896.5840685898.

Adding to 720730752 its reverse (257037027), we get a palindrome (977767779).

The spelling of 720730752 in words is "seven hundred twenty million, seven hundred thirty thousand, seven hundred fifty-two".