8220422228 has 12 divisors (see below), whose sum is σ = 14394668820. Its totient is φ = 4107659712.

The previous prime is 8220422213. The next prime is 8220422239. The reversal of 8220422228 is 8222240228.

It can be written as a sum of positive squares in 2 ways, for example, as 6906939664 + 1313482564 = 83108^2 + 36242^2 .

It is a junction number, because it is equal to n+sod(n) for n = 8220422194 and 8220422203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 630593 + ... + 643496.

It is an arithmetic number, because the mean of its divisors is an integer number (1199555735).

Almost surely, 2^8220422228 is an apocalyptic number.

It is an amenable number.

8220422228 is a deficient number, since it is larger than the sum of its proper divisors (6174246592).

8220422228 is a wasteful number, since it uses less digits than its factorization.

8220422228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1275706 (or 1275704 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 32.

The square root of 8220422228 is about 90666.5441494270. The cubic root of 8220422228 is about 2018.2023535864.

The spelling of 8220422228 in words is "eight billion, two hundred twenty million, four hundred twenty-two thousand, two hundred twenty-eight".