220211028 has 48 divisors (see below), whose sum is σ = 575064000. Its totient is φ = 72870624.

The previous prime is 220211021. The next prime is 220211051. The reversal of 220211028 is 820112022.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 220211028.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220211021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7678 + ... + 22346.

It is an arithmetic number, because the mean of its divisors is an integer number (11980500).

Almost surely, 2^220211028 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220211028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (287532000).

220211028 is an abundant number, since it is smaller than the sum of its proper divisors (354852972).

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

220211028 is a wasteful number, since it uses less digits than its factorization.

220211028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14821 (or 14813 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 220211028 is about 14839.5090215276. The cubic root of 220211028 is about 603.8740326170.

The spelling of 220211028 in words is "two hundred twenty million, two hundred eleven thousand, twenty-eight".