173438 has 4 divisors (see below), whose sum is σ = 260160. Its totient is φ = 86718.

The previous prime is 173431. The next prime is 173473. The reversal of 173438 is 834371.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 834371 = 23 ⋅36277.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (173431) by changing a digit.

173438 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 as a sum of consecutive naturals, namely, 43358 + ... + 43361.

It is an arithmetic number, because the mean of its divisors is an integer number (65040).

2¹⁷³⁴³⁸ is an apocalyptic number.

173438 is a deficient number, since it is larger than the sum of its proper divisors (86722).

173438 is an equidigital number, since it uses as much as digits as its factorization.

173438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86721.

The product of its digits is 2016, while the sum is 26.

The square root of 173438 is about 416.4588815237. The cubic root of 173438 is about 55.7675312022.

The spelling of 173438 in words is "one hundred seventy-three thousand, four hundred thirty-eight".