2221002028 has 36 divisors (see below), whose sum is σ = 4588835160. Its totient is φ = 937645632.

The previous prime is 2221002013. The next prime is 2221002029. The reversal of 2221002028 is 8202001222.

It is a super-2 number, since 2×2221002028² = 9865700016760225568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2221001996 and 2221002014.

It is not an unprimeable number, because it can be changed into a prime (2221002029) 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 11 ways as a sum of consecutive naturals, for example, 71433 + ... + 97696.

Almost surely, 2^2221002028 is an apocalyptic number.

2221002028 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2221002028 is an abundant number, since it is smaller than the sum of its proper divisors (2367833132).

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

2221002028 is a wasteful number, since it uses less digits than its factorization.

2221002028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169214 (or 169205 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 2221002028 is about 47127.5081878938. The cubic root of 2221002028 is about 1304.7169917169.

The spelling of 2221002028 in words is "two billion, two hundred twenty-one million, two thousand, twenty-eight".