191928 has 32 divisors (see below), whose sum is σ = 524160. Its totient is φ = 58080.

The previous prime is 191911. The next prime is 191929. The reversal of 191928 is 829191.

It is a junction number, because it is equal to n+sod(n) for n = 191895 and 191904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191929) by changing a digit.

191928 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100 + ... + 627.

It is an arithmetic number, because the mean of its divisors is an integer number (16380).

2¹⁹¹⁹²⁸ is an apocalyptic number.

It is an amenable number.

191928 is an abundant number, since it is smaller than the sum of its proper divisors (332232).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

191928 is a wasteful number, since it uses less digits than its factorization.

191928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747 (or 743 counting only the distinct ones).

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

The square root of 191928 is about 438.0958799167. The cubic root of 191928 is about 57.6827706629.

The spelling of 191928 in words is "one hundred ninety-one thousand, nine hundred twenty-eight".