8709288720 has 160 divisors (see below), whose sum is σ = 29679243264. Its totient is φ = 2095142400.

The previous prime is 8709288701. The next prime is 8709288727. The reversal of 8709288720 is 278829078.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (8709288727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 333249 + ... + 358431.

Almost surely, 2^8709288720 is an apocalyptic number.

8709288720 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 8709288720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14839621632).

8709288720 is an abundant number, since it is smaller than the sum of its proper divisors (20969954544).

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

8709288720 is a wasteful number, since it uses less digits than its factorization.

8709288720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25341 (or 25335 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 51.

The square root of 8709288720 is about 93323.5700131537. The cubic root of 8709288720 is about 2057.4418177168.

The spelling of 8709288720 in words is "eight billion, seven hundred nine million, two hundred eighty-eight thousand, seven hundred twenty".