9720369280 has 64 divisors (see below), whose sum is σ = 23467990680. Its totient is φ = 3849625600.

The previous prime is 9720369209. The next prime is 9720369341. The reversal of 9720369280 is 829630279.

It can be written as a sum of positive squares in 4 ways, for example, as 9088952896 + 631416384 = 95336^2 + 25128^2 .

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 9720369280.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10549 + ... + 139828.

Almost surely, 2^9720369280 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 9720369280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11733995340).

9720369280 is an abundant number, since it is smaller than the sum of its proper divisors (13747621400).

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

9720369280 is a wasteful number, since it uses less digits than its factorization.

9720369280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150497 (or 150485 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 9720369280 is about 98591.9331385687. The cubic root of 9720369280 is about 2134.1630088859.

The spelling of 9720369280 in words is "nine billion, seven hundred twenty million, three hundred sixty-nine thousand, two hundred eighty".