171628 has 12 divisors (see below), whose sum is σ = 303912. Its totient is φ = 84800.

The previous prime is 171617. The next prime is 171629. The reversal of 171628 is 826171.

It is not an unprimeable number, because it can be changed into a prime (171629) by changing a digit.

171628 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 228 + ... + 628.

It is an arithmetic number, because the mean of its divisors is an integer number (25326).

2¹⁷¹⁶²⁸ is an apocalyptic number.

It is an amenable number.

171628 is a deficient number, since it is larger than the sum of its proper divisors (132284).

171628 is a wasteful number, since it uses less digits than its factorization.

171628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512 (or 510 counting only the distinct ones).

The product of its digits is 672, while the sum is 25.

The square root of 171628 is about 414.2800984841. The cubic root of 171628 is about 55.5728556492.

Adding to 171628 its reverse (826171), we get a palindrome (997799).

The spelling of 171628 in words is "one hundred seventy-one thousand, six hundred twenty-eight".