12217944 has 32 divisors (see below), whose sum is σ = 30633840. Its totient is φ = 4060800.

The previous prime is 12217943. The next prime is 12217949. The reversal of 12217944 is 44971221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12217943) by changing a digit.

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, 12514 + ... + 13454.

Almost surely, 2^12217944 is an apocalyptic number.

It is an amenable number.

12217944 is an abundant number, since it is smaller than the sum of its proper divisors (18415896).

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

12217944 is a wasteful number, since it uses less digits than its factorization.

12217944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1491 (or 1487 counting only the distinct ones).

The product of its digits is 4032, while the sum is 30.

The square root of 12217944 is about 3495.4175716215. The cubic root of 12217944 is about 230.3205612036.

The spelling of 12217944 in words is "twelve million, two hundred seventeen thousand, nine hundred forty-four".