22208538 has 32 divisors (see below), whose sum is σ = 48968640. Its totient is φ = 6658560.

The previous prime is 22208533. The next prime is 22208539. The reversal of 22208538 is 83580222.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22208533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4668 + ... + 8136.

It is an arithmetic number, because the mean of its divisors is an integer number (1530270).

Almost surely, 2^22208538 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22208538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24484320).

22208538 is an abundant number, since it is smaller than the sum of its proper divisors (26760102).

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

22208538 is a wasteful number, since it uses less digits than its factorization.

22208538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3582.

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 22208538 is about 4712.5935534480. The cubic root of 22208538 is about 281.0865013176.

The spelling of 22208538 in words is "twenty-two million, two hundred eight thousand, five hundred thirty-eight".