28017317728 has 24 divisors (see below), whose sum is σ = 56093997960. Its totient is φ = 13771223040.

The previous prime is 28017317683. The next prime is 28017317807. The reversal of 28017317728 is 82771371082.

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, 7417953 + ... + 7421728.

It is an arithmetic number, because the mean of its divisors is an integer number (2337249915).

Almost surely, 2^28017317728 is an apocalyptic number.

It is an amenable number.

28017317728 is an abundant number, since it is smaller than the sum of its proper divisors (28076680232).

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

28017317728 is a wasteful number, since it uses less digits than its factorization.

28017317728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14839750 (or 14839742 counting only the distinct ones).

The product of its (nonzero) digits is 263424, while the sum is 46.

The spelling of 28017317728 in words is "twenty-eight billion, seventeen million, three hundred seventeen thousand, seven hundred twenty-eight".