1215188672 has 14 divisors (see below), whose sum is σ = 2411390148. Its totient is φ = 607594304.

The previous prime is 1215188659. The next prime is 1215188677. The reversal of 1215188672 is 2768815121.

It is not an unprimeable number, because it can be changed into a prime (1215188677) 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 as a sum of consecutive naturals, namely, 9493598 + ... + 9493725.

Almost surely, 2^1215188672 is an apocalyptic number.

It is an amenable number.

1215188672 is a deficient number, since it is larger than the sum of its proper divisors (1196201476).

1215188672 is an equidigital number, since it uses as much as digits as its factorization.

1215188672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18987335 (or 18987325 counting only the distinct ones).

The product of its digits is 53760, while the sum is 41.

The square root of 1215188672 is about 34859.5563941941. The cubic root of 1215188672 is about 1067.1232219182.

The spelling of 1215188672 in words is "one billion, two hundred fifteen million, one hundred eighty-eight thousand, six hundred seventy-two".