22128819 has 8 divisors (see below), whose sum is σ = 29599440. Its totient is φ = 14705376.

The previous prime is 22128811. The next prime is 22128839. The reversal of 22128819 is 91882122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22128819 - 2³ = 22128811 is a prime.

It is a super-2 number, since 2×22128819² = 979369260669522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22128819.

It is not an unprimeable number, because it can be changed into a prime (22128811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10684 + ... + 12585.

It is an arithmetic number, because the mean of its divisors is an integer number (3699930).

Almost surely, 2^22128819 is an apocalyptic number.

22128819 is a deficient number, since it is larger than the sum of its proper divisors (7470621).

22128819 is a wasteful number, since it uses less digits than its factorization.

22128819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23589.

The product of its digits is 4608, while the sum is 33.

The square root of 22128819 is about 4704.1278681600. The cubic root of 22128819 is about 280.7497719634.

The spelling of 22128819 in words is "twenty-two million, one hundred twenty-eight thousand, eight hundred nineteen".