171440 has 20 divisors (see below), whose sum is σ = 398784. Its totient is φ = 68544.

The previous prime is 171439. The next prime is 171449. The reversal of 171440 is 44171.

171440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (17) coincides with the sum of the digits of its distinct prime factors.

It is a plaindrome in base 14.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 171440.

It is not an unprimeable number, because it can be changed into a prime (171449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 992 + ... + 1151.

2¹⁷¹⁴⁴⁰ is an apocalyptic number.

171440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

171440 is an abundant number, since it is smaller than the sum of its proper divisors (227344).

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

171440 is a wasteful number, since it uses less digits than its factorization.

171440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2156 (or 2150 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 171440 is about 414.0531366866. The cubic root of 171440 is about 55.5525568752.

The spelling of 171440 in words is "one hundred seventy-one thousand, four hundred forty", and thus it is an iban number.