28715675856 has 40 divisors (see below), whose sum is σ = 84779615424. Its totient is φ = 8204478720.

The previous prime is 28715675843. The next prime is 28715675861. The reversal of 28715675856 is 65857651782.

It is a super-2 number, since 2×28715675856² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28715675856.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42731325 + ... + 42731996.

Almost surely, 2^28715675856 is an apocalyptic number.

It is an amenable number.

28715675856 is an abundant number, since it is smaller than the sum of its proper divisors (56063939568).

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

28715675856 is a wasteful number, since it uses less digits than its factorization.

28715675856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85463339 (or 85463333 counting only the distinct ones).

The product of its digits is 28224000, while the sum is 60.

The spelling of 28715675856 in words is "twenty-eight billion, seven hundred fifteen million, six hundred seventy-five thousand, eight hundred fifty-six".