22809816 has 32 divisors (see below), whose sum is σ = 63361200. Its totient is φ = 7603200.

The previous prime is 22809781. The next prime is 22809821. The reversal of 22809816 is 61890822.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52585 + ... + 53016.

Almost surely, 2^22809816 is an apocalyptic number.

It is an amenable number.

22809816 is an abundant number, since it is smaller than the sum of its proper divisors (40551384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22809816 is a wasteful number, since it uses less digits than its factorization.

22809816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105616 (or 105606 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 22809816 is about 4775.9623114091. The cubic root of 22809816 is about 283.6006753107.

The spelling of 22809816 in words is "twenty-two million, eight hundred nine thousand, eight hundred sixteen".