8719209720 has 192 divisors, whose sum is σ = 30833449920. Its totient is φ = 2124029952.

The previous prime is 8719209703. The next prime is 8719209749. The reversal of 8719209720 is 279029178.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 444357 + ... + 463563.

It is an arithmetic number, because the mean of its divisors is an integer number (160590885).

Almost surely, 2^8719209720 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 8719209720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15416724960).

8719209720 is an abundant number, since it is smaller than the sum of its proper divisors (22114240200).

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

8719209720 is a wasteful number, since it uses less digits than its factorization.

8719209720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19334 (or 19327 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The square root of 8719209720 is about 93376.7086590655. The cubic root of 8719209720 is about 2058.2227515467. Note that the first 3 decimals are identical.

The spelling of 8719209720 in words is "eight billion, seven hundred nineteen million, two hundred nine thousand, seven hundred twenty".