28048171 has 4 divisors (see below), whose sum is σ = 28061344. Its totient is φ = 28035000.

The previous prime is 28048129. The next prime is 28048217. The reversal of 28048171 is 17184082.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28048171 - 2⁷ = 28048043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28048121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2580 + ... + 7921.

It is an arithmetic number, because the mean of its divisors is an integer number (7015336).

Almost surely, 2^28048171 is an apocalyptic number.

28048171 is a deficient number, since it is larger than the sum of its proper divisors (13173).

28048171 is a wasteful number, since it uses less digits than its factorization.

28048171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13172.

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

The square root of 28048171 is about 5296.0523977770. The cubic root of 28048171 is about 303.8329349538.

The spelling of 28048171 in words is "twenty-eight million, forty-eight thousand, one hundred seventy-one".