22881144 has 128 divisors (see below), whose sum is σ = 68947200. Its totient is φ = 6236160.

The previous prime is 22881137. The next prime is 22881163. The reversal of 22881144 is 44118822.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

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

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 202432 + ... + 202544.

It is an arithmetic number, because the mean of its divisors is an integer number (538650).

Almost surely, 2^22881144 is an apocalyptic number.

22881144 is a gapful number since it is divisible by the number (24) 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 22881144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34473600).

22881144 is an abundant number, since it is smaller than the sum of its proper divisors (46066056).

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

22881144 is a wasteful number, since it uses less digits than its factorization.

22881144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205 (or 201 counting only the distinct ones).

The product of its digits is 4096, while the sum is 30.

The square root of 22881144 is about 4783.4238783532. The cubic root of 22881144 is about 283.8959812147.

Adding to 22881144 its reverse (44118822), we get a palindrome (66999966).

The spelling of 22881144 in words is "twenty-two million, eight hundred eighty-one thousand, one hundred forty-four".