22128600 has 96 divisors (see below), whose sum is σ = 73901520. Its totient is φ = 5445120.

The previous prime is 22128593. The next prime is 22128629. The reversal of 22128600 is 682122.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 6382 + ... + 9218.

Almost surely, 2^22128600 is an apocalyptic number.

22128600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22128600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36950760).

22128600 is an abundant number, since it is smaller than the sum of its proper divisors (51772920).

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

22128600 is a wasteful number, since it uses less digits than its factorization.

22128600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2869 (or 2860 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 22128600 is about 4704.1045906740. The cubic root of 22128600 is about 280.7488458046.

The spelling of 22128600 in words is "twenty-two million, one hundred twenty-eight thousand, six hundred".