28715191197188 has 12 divisors (see below), whose sum is σ = 50282816169180. Its totient is φ = 14348672291712.

The previous prime is 28715191197149. The next prime is 28715191197233. The reversal of 28715191197188 is 88179119151782.

It can be written as a sum of positive squares in 2 ways, for example, as 23590138153024 + 5125053044164 = 4856968^2 + 2263858^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2230819481 + ... + 2230832352.

It is an arithmetic number, because the mean of its divisors is an integer number (4190234680765).

Almost surely, 2^{28715191197188} is an apocalyptic number.

It is an amenable number.

28715191197188 is a deficient number, since it is larger than the sum of its proper divisors (21567624971992).

28715191197188 is a wasteful number, since it uses less digits than its factorization.

28715191197188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4461653446 (or 4461653444 counting only the distinct ones).

The product of its digits is 20321280, while the sum is 68.

The spelling of 28715191197188 in words is "twenty-eight trillion, seven hundred fifteen billion, one hundred ninety-one million, one hundred ninety-seven thousand, one hundred eighty-eight".