22026240 has 144 divisors (see below), whose sum is σ = 76658400. Its totient is φ = 5849088.

The previous prime is 22026233. The next prime is 22026247. The reversal of 22026240 is 4262022.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22026233) and next prime (22026247).

It is a tau number, because it is divible by the number of its divisors (144).

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 (22026247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 92041 + ... + 92279.

It is an arithmetic number, because the mean of its divisors is an integer number (532350).

Almost surely, 2^22026240 is an apocalyptic number.

22026240 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 22026240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38329200).

22026240 is an abundant number, since it is smaller than the sum of its proper divisors (54632160).

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

22026240 is a wasteful number, since it uses less digits than its factorization.

22026240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272 (or 249 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 22026240 is about 4693.2121196468. The cubic root of 22026240 is about 280.3152910950.

Adding to 22026240 its reverse (4262022), we get a palindrome (26288262).

The spelling of 22026240 in words is "twenty-two million, twenty-six thousand, two hundred forty".