28271173 has 4 divisors (see below), whose sum is σ = 32309920. Its totient is φ = 24232428.

The previous prime is 28271137. The next prime is 28271179. The reversal of 28271173 is 37117282.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28271173 - 2⁹ = 28270661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28271179) 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, 2019363 + ... + 2019376.

It is an arithmetic number, because the mean of its divisors is an integer number (8077480).

Almost surely, 2^28271173 is an apocalyptic number.

It is an amenable number.

28271173 is a deficient number, since it is larger than the sum of its proper divisors (4038747).

28271173 is an equidigital number, since it uses as much as digits as its factorization.

28271173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4038746.

The product of its digits is 4704, while the sum is 31.

The square root of 28271173 is about 5317.0643215970. The cubic root of 28271173 is about 304.6360363292.

The spelling of 28271173 in words is "twenty-eight million, two hundred seventy-one thousand, one hundred seventy-three".