22554444 has 144 divisors (see below), whose sum is σ = 66890880. Its totient is φ = 5829120.

The previous prime is 22554419. The next prime is 22554449. The reversal of 22554444 is 44445522.

22554444 = 17² + 18² + ... + 407².

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

Its product of digits (25600) is a multiple of the sum of its prime factors (100).

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (22554449) 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 47 ways as a sum of consecutive naturals, for example, 980617 + ... + 980639.

It is an arithmetic number, because the mean of its divisors is an integer number (464520).

Almost surely, 2^22554444 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 22554444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33445440).

22554444 is an abundant number, since it is smaller than the sum of its proper divisors (44336436).

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

22554444 is a wasteful number, since it uses less digits than its factorization.

22554444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100 (or 75 counting only the distinct ones).

The product of its digits is 25600, while the sum is 30.

The square root of 22554444 is about 4749.1519242913. The cubic root of 22554444 is about 282.5383308732.

Adding to 22554444 its reverse (44445522), we get a palindrome (66999966).

The spelling of 22554444 in words is "twenty-two million, five hundred fifty-four thousand, four hundred forty-four".