8720075520 has 432 divisors, whose sum is σ = 33530021280. Its totient is φ = 2145042432.

The previous prime is 8720075519. The next prime is 8720075543. The reversal of 8720075520 is 255700278.

8720075520 is a `hidden beast` number, since 87 + 20 + 0 + 7 + 552 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (432).

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 5839894 + ... + 5841386.

It is an arithmetic number, because the mean of its divisors is an integer number (77615790).

Almost surely, 2^8720075520 is an apocalyptic number.

8720075520 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 8720075520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16765010640).

8720075520 is an abundant number, since it is smaller than the sum of its proper divisors (24809945760).

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

8720075520 is a wasteful number, since it uses less digits than its factorization.

8720075520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1549 (or 1516 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 36.

The square root of 8720075520 is about 93381.3446037269. The cubic root of 8720075520 is about 2058.2908750860.

Adding to 8720075520 its reverse (255700278), we get a palindrome (8975775798).

The spelling of 8720075520 in words is "eight billion, seven hundred twenty million, seventy-five thousand, five hundred twenty".