22244440 has 32 divisors (see below), whose sum is σ = 52686000. Its totient is φ = 8429184.

The previous prime is 22244429. The next prime is 22244441. The reversal of 22244440 is 4444222.

It is a super-2 number, since 2×22244440² = 989630221827200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22244441) 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, 13875 + ... + 15394.

Almost surely, 2^22244440 is an apocalyptic number.

22244440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22244440 is an abundant number, since it is smaller than the sum of its proper divisors (30441560).

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

22244440 is a wasteful number, since it uses less digits than its factorization.

22244440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29299 (or 29295 counting only the distinct ones).

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

The square root of 22244440 is about 4716.4011703840. The cubic root of 22244440 is about 281.2378865565.

Adding to 22244440 its reverse (4444222), we get a palindrome (26688662).

The spelling of 22244440 in words is "twenty-two million, two hundred forty-four thousand, four hundred forty".