720611320 has 128 divisors (see below), whose sum is σ = 1941589440. Its totient is φ = 237219840.

The previous prime is 720611263. The next prime is 720611383. The reversal of 720611320 is 23116027.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 720611291 and 720611300.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 301972 + ... + 304348.

Almost surely, 2^720611320 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 720611320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (970794720).

720611320 is an abundant number, since it is smaller than the sum of its proper divisors (1220978120).

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

720611320 is a wasteful number, since it uses less digits than its factorization.

720611320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2465 (or 2461 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 720611320 is about 26844.2045887003. The cubic root of 720611320 is about 896.5345416601.

Adding to 720611320 its reverse (23116027), we get a palindrome (743727347).

The spelling of 720611320 in words is "seven hundred twenty million, six hundred eleven thousand, three hundred twenty".