22243648 has 84 divisors (see below), whose sum is σ = 52902612. Its totient is φ = 9246720.

The previous prime is 22243631. The next prime is 22243657. The reversal of 22243648 is 84634222.

It can be written as a sum of positive squares in 2 ways, for example, as 10188864 + 12054784 = 3192^2 + 3472^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 128490 + ... + 128662.

It is an arithmetic number, because the mean of its divisors is an integer number (629793).

Almost surely, 2^22243648 is an apocalyptic number.

22243648 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22243648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26451306).

22243648 is an abundant number, since it is smaller than the sum of its proper divisors (30658964).

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

22243648 is a wasteful number, since it uses less digits than its factorization.

22243648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240 (or 223 counting only the distinct ones).

The product of its digits is 18432, while the sum is 31.

The square root of 22243648 is about 4716.3172073134. The cubic root of 22243648 is about 281.2345487479.

The spelling of 22243648 in words is "twenty-two million, two hundred forty-three thousand, six hundred forty-eight".