8809720920 has 1024 divisors, whose sum is σ = 40932864000. Its totient is φ = 1625702400.

The previous prime is 8809720837. The next prime is 8809720939. The reversal of 8809720920 is 290279088.

It is a super-2 number, since 2×8809720920² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

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 255 ways as a sum of consecutive naturals, for example, 31351180 + ... + 31351460.

It is an arithmetic number, because the mean of its divisors is an integer number (39973500).

Almost surely, 2^8809720920 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 8809720920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20466432000).

8809720920 is an abundant number, since it is smaller than the sum of its proper divisors (32123143080).

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

8809720920 is a wasteful number, since it uses less digits than its factorization.

8809720920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361 (or 351 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 8809720920 is about 93860.1135733385. The cubic root of 8809720920 is about 2065.3201566504.

The spelling of 8809720920 in words is "eight billion, eight hundred nine million, seven hundred twenty thousand, nine hundred twenty".