22708809 has 16 divisors (see below), whose sum is σ = 33733440. Its totient is φ = 15098400.

The previous prime is 22708801. The next prime is 22708813. The reversal of 22708809 is 90880722.

It is not a de Polignac number, because 22708809 - 2³ = 22708801 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (22708801) 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, 11709 + ... + 13509.

It is an arithmetic number, because the mean of its divisors is an integer number (2108340).

Almost surely, 2^22708809 is an apocalyptic number.

It is an amenable number.

22708809 is a deficient number, since it is larger than the sum of its proper divisors (11024631).

22708809 is a wasteful number, since it uses less digits than its factorization.

22708809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2277 (or 2271 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 22708809 is about 4765.3760607113. The cubic root of 22708809 is about 283.1814400003.

The spelling of 22708809 in words is "twenty-two million, seven hundred eight thousand, eight hundred nine".