28056768 has 56 divisors (see below), whose sum is σ = 78150720. Its totient is φ = 8858880.

The previous prime is 28056727. The next prime is 28056773. The reversal of 28056768 is 86765082.

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, 198 + ... + 7493.

Almost surely, 2^28056768 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28056768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39075360).

28056768 is an abundant number, since it is smaller than the sum of its proper divisors (50093952).

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

28056768 is a wasteful number, since it uses less digits than its factorization.

28056768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7725 (or 7715 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 42.

The square root of 28056768 is about 5296.8639778646. The cubic root of 28056768 is about 303.8639742316.

The spelling of 28056768 in words is "twenty-eight million, fifty-six thousand, seven hundred sixty-eight".