8720473776 has 160 divisors (see below), whose sum is σ = 27445862400. Its totient is φ = 2330415360.

The previous prime is 8720473747. The next prime is 8720473787. The reversal of 8720473776 is 6773740278.

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, 495691 + ... + 512981.

It is an arithmetic number, because the mean of its divisors is an integer number (171536640).

Almost surely, 2^8720473776 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 8720473776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13722931200).

8720473776 is an abundant number, since it is smaller than the sum of its proper divisors (18725388624).

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

8720473776 is a wasteful number, since it uses less digits than its factorization.

8720473776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17407 (or 17401 counting only the distinct ones).

The product of its (nonzero) digits is 2765952, while the sum is 51.

The square root of 8720473776 is about 93383.4769967364. The cubic root of 8720473776 is about 2058.3222094558.

The spelling of 8720473776 in words is "eight billion, seven hundred twenty million, four hundred seventy-three thousand, seven hundred seventy-six".