22109388 has 72 divisors (see below), whose sum is σ = 63201600. Its totient is φ = 5981472.

The previous prime is 22109383. The next prime is 22109429. The reversal of 22109388 is 88390122.

It is not an unprimeable number, because it can be changed into a prime (22109383) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10183 + ... + 12161.

It is an arithmetic number, because the mean of its divisors is an integer number (877800).

Almost surely, 2^22109388 is an apocalyptic number.

22109388 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 22109388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31600800).

22109388 is an abundant number, since it is smaller than the sum of its proper divisors (41092212).

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

22109388 is a wasteful number, since it uses less digits than its factorization.

22109388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2019 (or 2010 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 22109388 is about 4702.0621008234. The cubic root of 22109388 is about 280.6675737777.

The spelling of 22109388 in words is "twenty-two million, one hundred nine thousand, three hundred eighty-eight".