22439144 has 48 divisors (see below), whose sum is σ = 52089120. Its totient is φ = 8873280.

The previous prime is 22439119. The next prime is 22439189. The reversal of 22439144 is 44193422.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8279 + ... + 10649.

It is an arithmetic number, because the mean of its divisors is an integer number (1085190).

Almost surely, 2^22439144 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 22439144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26044560).

22439144 is an abundant number, since it is smaller than the sum of its proper divisors (29649976).

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

22439144 is a wasteful number, since it uses less digits than its factorization.

22439144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2410 (or 2393 counting only the distinct ones).

The product of its digits is 6912, while the sum is 29.

The square root of 22439144 is about 4736.9973611983. The cubic root of 22439144 is about 282.0560557881.

The spelling of 22439144 in words is "twenty-two million, four hundred thirty-nine thousand, one hundred forty-four".