12217345928 has 12 divisors (see below), whose sum is σ = 22908109815. Its totient is φ = 6108516648.

The previous prime is 12217345883. The next prime is 12217345979. The reversal of 12217345928 is 82954371221.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

12217345928 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 6108672964 + 6108672964 = 78158^2 + 78158^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=78158.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 293093 + ... + 332171.

Almost surely, 2^12217345928 is an apocalyptic number.

It is an amenable number.

12217345928 is a deficient number, since it is larger than the sum of its proper divisors (10690763887).

12217345928 is an frugal number, since it uses more digits than its factorization.

12217345928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78164 (or 39081 counting only the distinct ones).

The product of its digits is 241920, while the sum is 44.

The spelling of 12217345928 in words is "twelve billion, two hundred seventeen million, three hundred forty-five thousand, nine hundred twenty-eight".