22128028 has 48 divisors (see below), whose sum is σ = 43563744. Its totient is φ = 9768960.

The previous prime is 22128019. The next prime is 22128061. The reversal of 22128028 is 82082122.

It is a junction number, because it is equal to n+sod(n) for n = 22127993 and 22128011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 206751 + ... + 206857.

It is an arithmetic number, because the mean of its divisors is an integer number (907578).

Almost surely, 2^22128028 is an apocalyptic number.

It is an amenable number.

22128028 is a deficient number, since it is larger than the sum of its proper divisors (21435716).

22128028 is a wasteful number, since it uses less digits than its factorization.

22128028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262 (or 260 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 25.

The square root of 22128028 is about 4704.0437923132. The cubic root of 22128028 is about 280.7464267673.

The spelling of 22128028 in words is "twenty-two million, one hundred twenty-eight thousand, twenty-eight".