22405609 has 16 divisors (see below), whose sum is σ = 24624000. Its totient is φ = 20300544.

The previous prime is 22405597. The next prime is 22405613. The reversal of 22405609 is 90650422.

It is a cyclic number.

It is not a de Polignac number, because 22405609 - 2¹¹ = 22403561 is a prime.

It is a super-2 number, since 2×22405609² = 1004022629321762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22405679) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112492 + ... + 112690.

It is an arithmetic number, because the mean of its divisors is an integer number (1539000).

Almost surely, 2^22405609 is an apocalyptic number.

It is an amenable number.

22405609 is a deficient number, since it is larger than the sum of its proper divisors (2218391).

22405609 is a wasteful number, since it uses less digits than its factorization.

22405609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 22405609 is about 4733.4563481667. The cubic root of 22405609 is about 281.9154760681.

Subtracting from 22405609 its product of nonzero digits (4320), we obtain a square (22401289 = 4733²).

The spelling of 22405609 in words is "twenty-two million, four hundred five thousand, six hundred nine".