22003648 has 28 divisors (see below), whose sum is σ = 44165520. Its totient is φ = 10875392.

The previous prime is 22003613. The next prime is 22003649. The reversal of 22003648 is 84630022.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22003649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3765 + ... + 7627.

It is an arithmetic number, because the mean of its divisors is an integer number (1577340).

Almost surely, 2^22003648 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 22003648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22082760).

22003648 is an abundant number, since it is smaller than the sum of its proper divisors (22161872).

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

22003648 is an equidigital number, since it uses as much as digits as its factorization.

22003648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3964 (or 3954 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 22003648 is about 4690.8046218106. The cubic root of 22003648 is about 280.2194198451.

The spelling of 22003648 in words is "twenty-two million, three thousand, six hundred forty-eight".