8720891760 has 160 divisors (see below), whose sum is σ = 31030871040. Its totient is φ = 1984702464.

The previous prime is 8720891747. The next prime is 8720891827. The reversal of 8720891760 is 671980278.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 380301 + ... + 402579.

It is an arithmetic number, because the mean of its divisors is an integer number (193942944).

Almost surely, 2^8720891760 is an apocalyptic number.

8720891760 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8720891760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15515435520).

8720891760 is an abundant number, since it is smaller than the sum of its proper divisors (22309979280).

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

8720891760 is a wasteful number, since it uses less digits than its factorization.

8720891760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22535 (or 22529 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 48.

The square root of 8720891760 is about 93385.7149675474. The cubic root of 8720891760 is about 2058.3550949781.

The spelling of 8720891760 in words is "eight billion, seven hundred twenty million, eight hundred ninety-one thousand, seven hundred sixty".