8243087220 has 72 divisors (see below), whose sum is σ = 25356240000. Its totient is φ = 2167193280.

The previous prime is 8243087137. The next prime is 8243087221. The reversal of 8243087220 is 227803428.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8243087221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 309720 + ... + 335279.

It is an arithmetic number, because the mean of its divisors is an integer number (352170000).

Almost surely, 2^8243087220 is an apocalyptic number.

It is an amenable number.

8243087220 is an abundant number, since it is smaller than the sum of its proper divisors (17113152780).

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

8243087220 is a wasteful number, since it uses less digits than its factorization.

8243087220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645085 (or 645080 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 8243087220 is about 90791.4490467026. The cubic root of 8243087220 is about 2020.0554848662.

The spelling of 8243087220 in words is "eight billion, two hundred forty-three million, eighty-seven thousand, two hundred twenty".