22447812 has 12 divisors (see below), whose sum is σ = 52378256. Its totient is φ = 7482600.

The previous prime is 22447807. The next prime is 22447819. The reversal of 22447812 is 21874422.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 22447812.

It is not an unprimeable number, because it can be changed into a prime (22447819) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 935314 + ... + 935337.

Almost surely, 2^22447812 is an apocalyptic number.

It is an amenable number.

22447812 is an abundant number, since it is smaller than the sum of its proper divisors (29930444).

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

22447812 is a wasteful number, since it uses less digits than its factorization.

22447812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1870658 (or 1870656 counting only the distinct ones).

The product of its digits is 7168, while the sum is 30.

The square root of 22447812 is about 4737.9121984266. The cubic root of 22447812 is about 282.0923695196.

The spelling of 22447812 in words is "twenty-two million, four hundred forty-seven thousand, eight hundred twelve".