22424440 has 32 divisors (see below), whose sum is σ = 51030000. Its totient is φ = 8867584.

The previous prime is 22424429. The next prime is 22424489. The reversal of 22424440 is 4442422.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 411 + ... + 6709.

Almost surely, 2^22424440 is an apocalyptic number.

22424440 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 22424440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25515000).

22424440 is an abundant number, since it is smaller than the sum of its proper divisors (28605560).

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

22424440 is a wasteful number, since it uses less digits than its factorization.

22424440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6399 (or 6395 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 22.

The square root of 22424440 is about 4735.4450688399. The cubic root of 22424440 is about 281.9944334364.

Adding to 22424440 its reverse (4442422), we get a palindrome (26866862).

The spelling of 22424440 in words is "twenty-two million, four hundred twenty-four thousand, four hundred forty".