28500171 has 16 divisors (see below), whose sum is σ = 45715200. Its totient is φ = 15428448.

The previous prime is 28500163. The next prime is 28500239. The reversal of 28500171 is 17100582.

It is not a de Polignac number, because 28500171 - 2³ = 28500163 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28500071) 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 15 ways as a sum of consecutive naturals, for example, 35316 + ... + 36113.

It is an arithmetic number, because the mean of its divisors is an integer number (2857200).

Almost surely, 2^28500171 is an apocalyptic number.

28500171 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

28500171 is a deficient number, since it is larger than the sum of its proper divisors (17215029).

28500171 is a wasteful number, since it uses less digits than its factorization.

28500171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71458.

The product of its (nonzero) digits is 560, while the sum is 24.

The square root of 28500171 is about 5338.5551416090. Note that the first 3 decimals coincide. The cubic root of 28500171 is about 305.4563481247.

The spelling of 28500171 in words is "twenty-eight million, five hundred thousand, one hundred seventy-one".