22428089 has 4 divisors (see below), whose sum is σ = 22680180. Its totient is φ = 22176000.

The previous prime is 22428061. The next prime is 22428137. The reversal of 22428089 is 98082422.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98082422 = 2 ⋅49041211.

It can be written as a sum of positive squares in 2 ways, for example, as 7155625 + 15272464 = 2675^2 + 3908^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22428089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22428019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125912 + ... + 126089.

It is an arithmetic number, because the mean of its divisors is an integer number (5670045).

Almost surely, 2^22428089 is an apocalyptic number.

It is an amenable number.

22428089 is a deficient number, since it is larger than the sum of its proper divisors (252091).

22428089 is an equidigital number, since it uses as much as digits as its factorization.

22428089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252090.

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 22428089 is about 4735.8303390219. The cubic root of 22428089 is about 282.0097283836.

The spelling of 22428089 in words is "twenty-two million, four hundred twenty-eight thousand, eighty-nine".