22241340 has 144 divisors (see below), whose sum is σ = 75479040. Its totient is φ = 5255040.

The previous prime is 22241339. The next prime is 22241357. The reversal of 22241340 is 4314222.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 92941 + ... + 93179.

It is an arithmetic number, because the mean of its divisors is an integer number (524160).

Almost surely, 2^22241340 is an apocalyptic number.

22241340 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 22241340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37739520).

22241340 is an abundant number, since it is smaller than the sum of its proper divisors (53237700).

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

22241340 is a wasteful number, since it uses less digits than its factorization.

22241340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312 (or 307 counting only the distinct ones).

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

The square root of 22241340 is about 4716.0725185264. The cubic root of 22241340 is about 281.2248214497.

Adding to 22241340 its reverse (4314222), we get a palindrome (26555562).

The spelling of 22241340 in words is "twenty-two million, two hundred forty-one thousand, three hundred forty".