22444000 has 96 divisors (see below), whose sum is σ = 57238272. Its totient is φ = 8640000.

The previous prime is 22443989. The next prime is 22444003. The reversal of 22444000 is 44422.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22444003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123910 + ... + 124090.

It is an arithmetic number, because the mean of its divisors is an integer number (596232).

Almost surely, 2^22444000 is an apocalyptic number.

22444000 is a gapful number since it is divisible by the number (20) 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 22444000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28619136).

22444000 is an abundant number, since it is smaller than the sum of its proper divisors (34794272).

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

22444000 is a wasteful number, since it uses less digits than its factorization.

22444000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237 (or 219 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 22444000 is about 4737.5098944488. The cubic root of 22444000 is about 282.0764006732.

Adding to 22444000 its reverse (44422), we get a palindrome (22488422).

The spelling of 22444000 in words is "twenty-two million, four hundred forty-four thousand".