22128200 has 24 divisors (see below), whose sum is σ = 51448530. Its totient is φ = 8851200.

The previous prime is 22128193. The next prime is 22128229. The reversal of 22128200 is 282122.

It can be written as a sum of positive squares in 3 ways, for example, as 15888196 + 6240004 = 3986^2 + 2498^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55121 + ... + 55520.

Almost surely, 2^22128200 is an apocalyptic number.

22128200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22128200 is an abundant number, since it is smaller than the sum of its proper divisors (29320330).

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

22128200 is a wasteful number, since it uses less digits than its factorization.

22128200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110657 (or 110648 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 22128200 is about 4704.0620744204. The cubic root of 22128200 is about 280.7471541745.

The spelling of 22128200 in words is "twenty-two million, one hundred twenty-eight thousand, two hundred".