171798 has 32 divisors (see below), whose sum is σ = 397440. Its totient is φ = 48960.

The previous prime is 171793. The next prime is 171799. The reversal of 171798 is 897171.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171793) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1186 + ... + 1322.

It is an arithmetic number, because the mean of its divisors is an integer number (12420).

2¹⁷¹⁷⁹⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 171798, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198720).

171798 is an abundant number, since it is smaller than the sum of its proper divisors (225642).

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

171798 is a wasteful number, since it uses less digits than its factorization.

171798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172.

The product of its digits is 3528, while the sum is 33.

The square root of 171798 is about 414.4852228970. The cubic root of 171798 is about 55.5911981650.

It can be divided in two parts, 171 and 798, that added together give a palindrome (969).

The spelling of 171798 in words is "one hundred seventy-one thousand, seven hundred ninety-eight".