22149888 has 72 divisors (see below), whose sum is σ = 59652096. Its totient is φ = 7296000.

The previous prime is 22149887. The next prime is 22149889. The reversal of 22149888 is 88894122.

It is an interprime number because it is at equal distance from previous prime (22149887) and next prime (22149889).

It is not an unprimeable number, because it can be changed into a prime (22149887) 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, 115873 + ... + 116063.

Almost surely, 2^22149888 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22149888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29826048).

22149888 is an abundant number, since it is smaller than the sum of its proper divisors (37502208).

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

22149888 is a wasteful number, since it uses less digits than its factorization.

22149888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361 (or 347 counting only the distinct ones).

The product of its digits is 73728, while the sum is 42.

The square root of 22149888 is about 4706.3667515399. The cubic root of 22149888 is about 280.8388449601.

The spelling of 22149888 in words is "twenty-two million, one hundred forty-nine thousand, eight hundred eighty-eight".