28447856 has 20 divisors (see below), whose sum is σ = 56159352. Its totient is φ = 13955136.

The previous prime is 28447847. The next prime is 28447889. The reversal of 28447856 is 65874482.

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, 15926 + ... + 17621.

Almost surely, 2^28447856 is an apocalyptic number.

It is an amenable number.

28447856 is a deficient number, since it is larger than the sum of its proper divisors (27711496).

28447856 is a wasteful number, since it uses less digits than its factorization.

28447856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33608 (or 33602 counting only the distinct ones).

The product of its digits is 430080, while the sum is 44.

The square root of 28447856 is about 5333.6531570772. The cubic root of 28447856 is about 305.2693347854.

The spelling of 28447856 in words is "twenty-eight million, four hundred forty-seven thousand, eight hundred fifty-six".