28081173 has 8 divisors (see below), whose sum is σ = 37575936. Its totient is φ = 18653600.

The previous prime is 28081171. The next prime is 28081181. The reversal of 28081173 is 37118082.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28081173 - 2¹ = 28081171 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28081173.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28081171) 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 7 ways as a sum of consecutive naturals, for example, 15813 + ... + 17498.

It is an arithmetic number, because the mean of its divisors is an integer number (4696992).

Almost surely, 2^28081173 is an apocalyptic number.

It is an amenable number.

28081173 is a deficient number, since it is larger than the sum of its proper divisors (9494763).

28081173 is a wasteful number, since it uses less digits than its factorization.

28081173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33595.

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 28081173 is about 5299.1671987209. The cubic root of 28081173 is about 303.9520534090.

The spelling of 28081173 in words is "twenty-eight million, eighty-one thousand, one hundred seventy-three".