28282171 has 12 divisors (see below), whose sum is σ = 29569512. Its totient is φ = 27044928.

The previous prime is 28282159. The next prime is 28282217. The reversal of 28282171 is 17128282.

It is not a de Polignac number, because 28282171 - 2⁵ = 28282139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28282151) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 99796 + ... + 100078.

It is an arithmetic number, because the mean of its divisors is an integer number (2464126).

Almost surely, 2^28282171 is an apocalyptic number.

28282171 is a deficient number, since it is larger than the sum of its proper divisors (1287341).

28282171 is an equidigital number, since it uses as much as digits as its factorization.

28282171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430 (or 393 counting only the distinct ones).

The product of its digits is 3584, while the sum is 31.

The square root of 28282171 is about 5318.0984383518. The cubic root of 28282171 is about 304.6755341924.

The spelling of 28282171 in words is "twenty-eight million, two hundred eighty-two thousand, one hundred seventy-one".