8220591140 has 24 divisors (see below), whose sum is σ = 17858526840. Its totient is φ = 3174848768.

The previous prime is 8220591139. The next prime is 8220591149. The reversal of 8220591140 is 411950228.

It can be written as a sum of positive squares in 4 ways, for example, as 2595291136 + 5625300004 = 50944^2 + 75002^2 .

It is a junction number, because it is equal to n+sod(n) for n = 8220591097 and 8220591106.

It is not an unprimeable number, because it can be changed into a prime (8220591149) 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, 7086137 + ... + 7087296.

It is an arithmetic number, because the mean of its divisors is an integer number (744105285).

Almost surely, 2^8220591140 is an apocalyptic number.

It is an amenable number.

8220591140 is an abundant number, since it is smaller than the sum of its proper divisors (9637935700).

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

8220591140 is a wasteful number, since it uses less digits than its factorization.

8220591140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14173471 (or 14173469 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 8220591140 is about 90667.4756459007. The cubic root of 8220591140 is about 2018.2161767312.

The spelling of 8220591140 in words is "eight billion, two hundred twenty million, five hundred ninety-one thousand, one hundred forty".