22643680 has 48 divisors (see below), whose sum is σ = 54084240. Its totient is φ = 8957952.

The previous prime is 22643659. The next prime is 22643683. The reversal of 22643680 is 8634622.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22643683) 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 7 ways as a sum of consecutive naturals, for example, 14791 + ... + 16249.

It is an arithmetic number, because the mean of its divisors is an integer number (1126755).

Almost surely, 2^22643680 is an apocalyptic number.

22643680 is a gapful number since it is divisible by the number (20) 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 22643680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27042120).

22643680 is an abundant number, since it is smaller than the sum of its proper divisors (31440560).

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

22643680 is a wasteful number, since it uses less digits than its factorization.

22643680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1571 (or 1563 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 22643680 is about 4758.5375904788. The cubic root of 22643680 is about 282.9104587552.

The spelling of 22643680 in words is "twenty-two million, six hundred forty-three thousand, six hundred eighty".