8720356320 has 528 divisors, whose sum is σ = 33748438752. Its totient is φ = 2116316160.

The previous prime is 8720356319. The next prime is 8720356331. The reversal of 8720356320 is 236530278.

8720356320 is a `hidden beast` number, since 8 + 72 + 0 + 3 + 563 + 20 = 666.

It is a super-2 number, since 2×8720356320² (a number of 21 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 87 ways as a sum of consecutive naturals, for example, 122821885 + ... + 122821955.

Almost surely, 2^8720356320 is an apocalyptic number.

8720356320 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 8720356320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16874219376).

8720356320 is an abundant number, since it is smaller than the sum of its proper divisors (25028082432).

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

8720356320 is an equidigital number, since it uses as much as digits as its factorization.

8720356320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129 (or 94 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 8720356320 is about 93382.8481039211. The cubic root of 8720356320 is about 2058.3129682385.

Adding to 8720356320 its reverse (236530278), we get a palindrome (8956886598).

The spelling of 8720356320 in words is "eight billion, seven hundred twenty million, three hundred fifty-six thousand, three hundred twenty".