28117986574 has 8 divisors (see below), whose sum is σ = 42232405248. Its totient is φ = 14040518160.

The previous prime is 28117986527. The next prime is 28117986619. The reversal of 28117986574 is 47568971182.

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

It is a congruent number.

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, 9235662 + ... + 9238705.

It is an arithmetic number, because the mean of its divisors is an integer number (5279050656).

Almost surely, 2^28117986574 is an apocalyptic number.

28117986574 is a deficient number, since it is larger than the sum of its proper divisors (14114418674).

28117986574 is a wasteful number, since it uses less digits than its factorization.

28117986574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18475130.

The product of its digits is 6773760, while the sum is 58.

The spelling of 28117986574 in words is "twenty-eight billion, one hundred seventeen million, nine hundred eighty-six thousand, five hundred seventy-four".