28664073 has 12 divisors (see below), whose sum is σ = 41452528. Its totient is φ = 19086840.

The previous prime is 28664071. The next prime is 28664087. The reversal of 28664073 is 37046682.

28664073 is a `hidden beast` number, since 2 + 8 + 6 + 640 + 7 + 3 = 666.

It is not a de Polignac number, because 28664073 - 2¹ = 28664071 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28664071) 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 11 ways as a sum of consecutive naturals, for example, 10386 + ... + 12852.

Almost surely, 2^28664073 is an apocalyptic number.

It is an amenable number.

28664073 is a deficient number, since it is larger than the sum of its proper divisors (12788455).

28664073 is a wasteful number, since it uses less digits than its factorization.

28664073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3764 (or 3761 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 28664073 is about 5353.8839173071. The cubic root of 28664073 is about 306.0407801603.

The spelling of 28664073 in words is "twenty-eight million, six hundred sixty-four thousand, seventy-three".