720502320 has 80 divisors (see below), whose sum is σ = 2265069312. Its totient is φ = 189423360.

The previous prime is 720502319. The next prime is 720502397. The reversal of 720502320 is 23205027.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4102 + ... + 38181.

Almost surely, 2^720502320 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 720502320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1132534656).

720502320 is an abundant number, since it is smaller than the sum of its proper divisors (1544566992).

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

720502320 is a wasteful number, since it uses less digits than its factorization.

720502320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42370 (or 42364 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 720502320 is about 26842.1742785490. The cubic root of 720502320 is about 896.4893359716.

Adding to 720502320 its reverse (23205027), we get a palindrome (743707347).

The spelling of 720502320 in words is "seven hundred twenty million, five hundred two thousand, three hundred twenty".