22042044 has 42 divisors (see below), whose sum is σ = 57841560. Its totient is φ = 7346376.

The previous prime is 22042037. The next prime is 22042049. The reversal of 22042044 is 44024022.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22042049) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 864 + ... + 6695.

It is an arithmetic number, because the mean of its divisors is an integer number (1377180).

Almost surely, 2^22042044 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 22042044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28920780).

22042044 is an abundant number, since it is smaller than the sum of its proper divisors (35799516).

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

22042044 is an equidigital number, since it uses as much as digits as its factorization.

22042044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7581 (or 7564 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 22042044 is about 4694.8955259942. The cubic root of 22042044 is about 280.3823178736.

Adding to 22042044 its reverse (44024022), we get a palindrome (66066066).

The spelling of 22042044 in words is "twenty-two million, forty-two thousand, forty-four".