22005240 has 32 divisors (see below), whose sum is σ = 66016080. Its totient is φ = 5868032.

The previous prime is 22005199. The next prime is 22005241. The reversal of 22005240 is 4250022.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22005241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91569 + ... + 91808.

Almost surely, 2^22005240 is an apocalyptic number.

22005240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22005240 is an abundant number, since it is smaller than the sum of its proper divisors (44010840).

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

22005240 is a wasteful number, since it uses less digits than its factorization.

22005240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183391 (or 183387 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 22005240 is about 4690.9743124430. The cubic root of 22005240 is about 280.2261777936.

Adding to 22005240 its reverse (4250022), we get a palindrome (26255262).

The spelling of 22005240 in words is "twenty-two million, five thousand, two hundred forty".