22428609 has 16 divisors (see below), whose sum is σ = 34265088. Its totient is φ = 12783312.

The previous prime is 22428587. The next prime is 22428613. The reversal of 22428609 is 90682422.

It is not a de Polignac number, because 22428609 - 2⁷ = 22428481 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22428609.

It is not an unprimeable number, because it can be changed into a prime (22428619) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 8664 + ... + 10950.

It is an arithmetic number, because the mean of its divisors is an integer number (2141568).

Almost surely, 2^22428609 is an apocalyptic number.

It is an amenable number.

22428609 is a deficient number, since it is larger than the sum of its proper divisors (11836479).

22428609 is a wasteful number, since it uses less digits than its factorization.

22428609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2764.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 22428609 is about 4735.8852393190. The cubic root of 22428609 is about 282.0119078519.

The spelling of 22428609 in words is "twenty-two million, four hundred twenty-eight thousand, six hundred nine".