171438 has 8 divisors (see below), whose sum is σ = 342888. Its totient is φ = 57144.

The previous prime is 171427. The next prime is 171439. The reversal of 171438 is 834171.

It is a sphenic number, since it is the product of 3 distinct primes.

171438 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14281 + ... + 14292.

It is an arithmetic number, because the mean of its divisors is an integer number (42861).

2¹⁷¹⁴³⁸ is an apocalyptic number.

171438 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

171438 is a wasteful number, since it uses less digits than its factorization.

171438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28578.

The product of its digits is 672, while the sum is 24.

The square root of 171438 is about 414.0507215306. The cubic root of 171438 is about 55.5523408510.

The spelling of 171438 in words is "one hundred seventy-one thousand, four hundred thirty-eight".