28516784 has 20 divisors (see below), whose sum is σ = 55770984. Its totient is φ = 14124288.

The previous prime is 28516781. The next prime is 28516799. The reversal of 28516784 is 48761582.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (28516781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6617 + ... + 10040.

Almost surely, 2^28516784 is an apocalyptic number.

It is an amenable number.

28516784 is a deficient number, since it is larger than the sum of its proper divisors (27254200).

28516784 is a wasteful number, since it uses less digits than its factorization.

28516784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16772 (or 16766 counting only the distinct ones).

The product of its digits is 107520, while the sum is 41.

The square root of 28516784 is about 5340.1108602725. The cubic root of 28516784 is about 305.5156876591.

The spelling of 28516784 in words is "twenty-eight million, five hundred sixteen thousand, seven hundred eighty-four".