22189986 has 192 divisors, whose sum is σ = 67092480. Its totient is φ = 5132160.

The previous prime is 22189961. The next prime is 22189991. The reversal of 22189986 is 68998122.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 715791 + ... + 715821.

It is an arithmetic number, because the mean of its divisors is an integer number (349440).

Almost surely, 2^22189986 is an apocalyptic number.

22189986 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 22189986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33546240).

22189986 is an abundant number, since it is smaller than the sum of its proper divisors (44902494).

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

22189986 is a wasteful number, since it uses less digits than its factorization.

22189986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101 (or 98 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 22189986 is about 4710.6247993233. The cubic root of 22189986 is about 281.0082105646.

The spelling of 22189986 in words is "twenty-two million, one hundred eighty-nine thousand, nine hundred eighty-six".