28666984 has 16 divisors (see below), whose sum is σ = 53817120. Its totient is φ = 14315760.

The previous prime is 28666969. The next prime is 28666987. The reversal of 28666984 is 48966682.

It is not an unprimeable number, because it can be changed into a prime (28666987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6819 + ... + 10189.

It is an arithmetic number, because the mean of its divisors is an integer number (3363570).

Almost surely, 2^28666984 is an apocalyptic number.

It is an amenable number.

28666984 is a deficient number, since it is larger than the sum of its proper divisors (25150136).

28666984 is a wasteful number, since it uses less digits than its factorization.

28666984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4440 (or 4436 counting only the distinct ones).

The product of its digits is 995328, while the sum is 49.

The square root of 28666984 is about 5354.1557691199. The cubic root of 28666984 is about 306.0511398715.

The spelling of 28666984 in words is "twenty-eight million, six hundred sixty-six thousand, nine hundred eighty-four".