928191 has 12 divisors (see below), whose sum is σ = 1360856. Its totient is φ = 562320.

The previous prime is 928177. The next prime is 928223. The reversal of 928191 is 191829.

It is not a de Polignac number, because 928191 - 2⁵ = 928159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (928111) 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 11 ways as a sum of consecutive naturals, for example, 916 + ... + 1641.

2⁹²⁸¹⁹¹ is an apocalyptic number.

928191 is a deficient number, since it is larger than the sum of its proper divisors (432665).

928191 is a wasteful number, since it uses less digits than its factorization.

928191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2582 (or 2571 counting only the distinct ones).

The product of its digits is 1296, while the sum is 30.

The square root of 928191 is about 963.4266967445. The cubic root of 928191 is about 97.5466706216.

The spelling of 928191 in words is "nine hundred twenty-eight thousand, one hundred ninety-one".