220228928 has 14 divisors (see below), whose sum is σ = 437016906. Its totient is φ = 110114432.

The previous prime is 220228927. The next prime is 220228937. The reversal of 220228928 is 829822022.

220228928 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 113891584 + 106337344 = 10672^2 + 10312^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220228927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1720475 + ... + 1720602.

Almost surely, 2^220228928 is an apocalyptic number.

It is an amenable number.

220228928 is a deficient number, since it is larger than the sum of its proper divisors (216787978).

220228928 is an equidigital number, since it uses as much as digits as its factorization.

220228928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3441089 (or 3441079 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 220228928 is about 14840.1121289564. The cubic root of 220228928 is about 603.8903942746.

The spelling of 220228928 in words is "two hundred twenty million, two hundred twenty-eight thousand, nine hundred twenty-eight".