28318171 has 8 divisors (see below), whose sum is σ = 32912640. Its totient is φ = 23860968.

The previous prime is 28318163. The next prime is 28318177. The reversal of 28318171 is 17181382.

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 28318171 - 2³ = 28318163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28318177) 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, 33871 + ... + 34696.

It is an arithmetic number, because the mean of its divisors is an integer number (4114080).

Almost surely, 2^28318171 is an apocalyptic number.

28318171 is a deficient number, since it is larger than the sum of its proper divisors (4594469).

28318171 is an equidigital number, since it uses as much as digits as its factorization.

28318171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68633.

The product of its digits is 2688, while the sum is 31.

The square root of 28318171 is about 5321.4820304122. The cubic root of 28318171 is about 304.8047518623.

The spelling of 28318171 in words is "twenty-eight million, three hundred eighteen thousand, one hundred seventy-one".