28117167 has 16 divisors (see below), whose sum is σ = 42749280. Its totient is φ = 16284672.

The previous prime is 28117129. The next prime is 28117181. The reversal of 28117167 is 76171182.

It is not a de Polignac number, because 28117167 - 2⁷ = 28117039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28117367) 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, 20542 + ... + 21867.

It is an arithmetic number, because the mean of its divisors is an integer number (2671830).

Almost surely, 2^28117167 is an apocalyptic number.

28117167 is a deficient number, since it is larger than the sum of its proper divisors (14632113).

28117167 is a wasteful number, since it uses less digits than its factorization.

28117167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42442.

The product of its digits is 4704, while the sum is 33.

The square root of 28117167 is about 5302.5623051502. The cubic root of 28117167 is about 304.0818649272.

The spelling of 28117167 in words is "twenty-eight million, one hundred seventeen thousand, one hundred sixty-seven".