8220288820 has 24 divisors (see below), whose sum is σ = 18171165600. Its totient is φ = 3115056672.

The previous prime is 8220288793. The next prime is 8220288827. The reversal of 8220288820 is 288820228.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8220288827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10815790 + ... + 10816549.

It is an arithmetic number, because the mean of its divisors is an integer number (757131900).

Almost surely, 2^8220288820 is an apocalyptic number.

It is an amenable number.

8220288820 is an abundant number, since it is smaller than the sum of its proper divisors (9950876780).

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

8220288820 is a wasteful number, since it uses less digits than its factorization.

8220288820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21632367 (or 21632365 counting only the distinct ones).

The product of its (nonzero) digits is 65536, while the sum is 40.

The square root of 8220288820 is about 90665.8084395656. The cubic root of 8220288820 is about 2018.1914358262.

The spelling of 8220288820 in words is "eight billion, two hundred twenty million, two hundred eighty-eight thousand, eight hundred twenty".