22442288 has 40 divisors (see below), whose sum is σ = 49081680. Its totient is φ = 9847040.

The previous prime is 22442281. The next prime is 22442311. The reversal of 22442288 is 88224422.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (22442281) 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, 2906 + ... + 7302.

It is an arithmetic number, because the mean of its divisors is an integer number (1227042).

Almost surely, 2^22442288 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 22442288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24540840).

22442288 is an abundant number, since it is smaller than the sum of its proper divisors (26639392).

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

22442288 is a wasteful number, since it uses less digits than its factorization.

22442288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4445 (or 4439 counting only the distinct ones).

The product of its digits is 16384, while the sum is 32.

The square root of 22442288 is about 4737.3292053646. The cubic root of 22442288 is about 282.0692283468.

It can be divided in two parts, 224422 and 88, that multiplied together give a square (19749136 = 4444²).

The spelling of 22442288 in words is "twenty-two million, four hundred forty-two thousand, two hundred eighty-eight".