It is a nude number because it is divisible by every one of its digits.
It is a congruent number.
It is an unprimeable number.
172368 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
2172368 is an apocalyptic number.
172368 is a gapful number since it is divisible by the number (18) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 172368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (300080).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
172368 is a wasteful number, since it uses less digits than its factorization.
172368 is an evil number, because the sum of its binary digits is even.
The square root of 172368 is about 415.1722534081. The cubic root of 172368 is about 55.6526113813.
The spelling of 172368 in words is "one hundred seventy-two thousand, three hundred sixty-eight".