22245409728 has 336 divisors, whose sum is σ = 68099391360. Its totient is φ = 7197465600.

The previous prime is 22245409717. The next prime is 22245409733. The reversal of 22245409728 is 82790454222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 124275943 + ... + 124276121.

It is an arithmetic number, because the mean of its divisors is an integer number (202676760).

Almost surely, 2^22245409728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22245409728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34049695680).

22245409728 is an abundant number, since it is smaller than the sum of its proper divisors (45853981632).

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

22245409728 is a wasteful number, since it uses less digits than its factorization.

22245409728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398 (or 376 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The spelling of 22245409728 in words is "twenty-two billion, two hundred forty-five million, four hundred nine thousand, seven hundred twenty-eight".