28502073 has 6 divisors (see below), whose sum is σ = 41169674. Its totient is φ = 19001376.

The previous prime is 28502053. The next prime is 28502101. The reversal of 28502073 is 37020582.

It can be written as a sum of positive squares in only one way, i.e., 22014864 + 6487209 = 4692^2 + 2547^2 .

It is not a de Polignac number, because 28502073 - 2⁶ = 28502009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28502053) 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 5 ways as a sum of consecutive naturals, for example, 1583440 + ... + 1583457.

Almost surely, 2^28502073 is an apocalyptic number.

It is an amenable number.

28502073 is a deficient number, since it is larger than the sum of its proper divisors (12667601).

28502073 is a wasteful number, since it uses less digits than its factorization.

28502073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3166903 (or 3166900 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 28502073 is about 5338.7332767240. The cubic root of 28502073 is about 305.4631429968.

The spelling of 28502073 in words is "twenty-eight million, five hundred two thousand, seventy-three".