22045740 has 48 divisors (see below), whose sum is σ = 62522880. Its totient is φ = 5803200.

The previous prime is 22045733. The next prime is 22045759. The reversal of 22045740 is 4754022.

It is a self number, because there is not a number n which added to its sum of digits gives 22045740.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2415 + ... + 7065.

It is an arithmetic number, because the mean of its divisors is an integer number (1302560).

Almost surely, 2^22045740 is an apocalyptic number.

22045740 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 22045740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31261440).

22045740 is an abundant number, since it is smaller than the sum of its proper divisors (40477140).

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

22045740 is a wasteful number, since it uses less digits than its factorization.

22045740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4742 (or 4740 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 24.

The square root of 22045740 is about 4695.2891284776. The cubic root of 22045740 is about 280.3979884580.

Adding to 22045740 its reverse (4754022), we get a palindrome (26799762).

The spelling of 22045740 in words is "twenty-two million, forty-five thousand, seven hundred forty".