28563028 has 72 divisors (see below), whose sum is σ = 59028480. Its totient is φ = 12055680.

The previous prime is 28563011. The next prime is 28563049. The reversal of 28563028 is 82036582.

It is a junction number, because it is equal to n+sod(n) for n = 28562984 and 28563002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 607701 + ... + 607747.

It is an arithmetic number, because the mean of its divisors is an integer number (819840).

Almost surely, 2^28563028 is an apocalyptic number.

It is an amenable number.

28563028 is an abundant number, since it is smaller than the sum of its proper divisors (30465452).

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

28563028 is a wasteful number, since it uses less digits than its factorization.

28563028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137 (or 122 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 28563028 is about 5344.4389789762. The cubic root of 28563028 is about 305.6807441084.

The spelling of 28563028 in words is "twenty-eight million, five hundred sixty-three thousand, twenty-eight".