22648736 has 72 divisors (see below), whose sum is σ = 51057216. Its totient is φ = 9803520.

The previous prime is 22648733. The next prime is 22648753. The reversal of 22648736 is 63784622.

It is a self number, because there is not a number n which added to its sum of digits gives 22648736.

It is not an unprimeable number, because it can be changed into a prime (22648733) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 481865 + ... + 481911.

It is an arithmetic number, because the mean of its divisors is an integer number (709128).

Almost surely, 2^22648736 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 22648736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25528608).

22648736 is an abundant number, since it is smaller than the sum of its proper divisors (28408480).

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

22648736 is a wasteful number, since it uses less digits than its factorization.

22648736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142 (or 97 counting only the distinct ones).

The product of its digits is 96768, while the sum is 38.

The square root of 22648736 is about 4759.0688164808. The cubic root of 22648736 is about 282.9315137668.

The spelling of 22648736 in words is "twenty-two million, six hundred forty-eight thousand, seven hundred thirty-six".