12224440 has 16 divisors (see below), whose sum is σ = 27505080. Its totient is φ = 4889760.

The previous prime is 12224413. The next prime is 12224473. The reversal of 12224440 is 4442221.

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 3 ways as a sum of consecutive naturals, for example, 152766 + ... + 152845.

Almost surely, 2^12224440 is an apocalyptic number.

12224440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12224440 is an abundant number, since it is smaller than the sum of its proper divisors (15280640).

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

12224440 is a wasteful number, since it uses less digits than its factorization.

12224440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305622 (or 305618 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 12224440 is about 3496.3466647345. The cubic root of 12224440 is about 230.3613726878.

Adding to 12224440 its reverse (4442221), we get a palindrome (16666661).

The spelling of 12224440 in words is "twelve million, two hundred twenty-four thousand, four hundred forty".