171928 has 8 divisors (see below), whose sum is σ = 322380. Its totient is φ = 85960.

The previous prime is 171923. The next prime is 171929. The reversal of 171928 is 829171.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 171896 and 171905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10738 + ... + 10753.

2¹⁷¹⁹²⁸ is an apocalyptic number.

It is an amenable number.

171928 is a deficient number, since it is larger than the sum of its proper divisors (150452).

171928 is a wasteful number, since it uses less digits than its factorization.

171928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21497 (or 21493 counting only the distinct ones).

The product of its digits is 1008, while the sum is 28.

The square root of 171928 is about 414.6420142726. The cubic root of 171928 is about 55.6052166318.

The spelling of 171928 in words is "one hundred seventy-one thousand, nine hundred twenty-eight".