1220220228 has 24 divisors (see below), whose sum is σ = 2851710400. Its totient is φ = 406092960.

The previous prime is 1220220227. The next prime is 1220220277. The reversal of 1220220228 is 8220220221.

It is not an unprimeable number, because it can be changed into a prime (1220220227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73003 + ... + 88146.

Almost surely, 2^1220220228 is an apocalyptic number.

It is an amenable number.

1220220228 is an abundant number, since it is smaller than the sum of its proper divisors (1631490172).

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

1220220228 is a wasteful number, since it uses less digits than its factorization.

1220220228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161787 (or 161785 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 1220220228 is about 34931.6508055374. The cubic root of 1220220228 is about 1068.5940214077.

Adding to 1220220228 its reverse (8220220221), we get a palindrome (9440440449).

The spelling of 1220220228 in words is "one billion, two hundred twenty million, two hundred twenty thousand, two hundred twenty-eight".