12217938 has 8 divisors (see below), whose sum is σ = 24435888. Its totient is φ = 4072644.

The previous prime is 12217913. The next prime is 12217939. The reversal of 12217938 is 83971221.

It is a sphenic number, since it is the product of 3 distinct primes.

12217938 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 12217899 and 12217908.

It is not an unprimeable number, because it can be changed into a prime (12217939) 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 3 ways as a sum of consecutive naturals, for example, 1018156 + ... + 1018167.

It is an arithmetic number, because the mean of its divisors is an integer number (3054486).

Almost surely, 2^12217938 is an apocalyptic number.

12217938 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12217938 is a wasteful number, since it uses less digits than its factorization.

12217938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2036328.

The product of its digits is 6048, while the sum is 33.

The square root of 12217938 is about 3495.4167133548. The cubic root of 12217938 is about 230.3205235016.

The spelling of 12217938 in words is "twelve million, two hundred seventeen thousand, nine hundred thirty-eight".