173428 has 12 divisors (see below), whose sum is σ = 306432. Its totient is φ = 85880.

The previous prime is 173359. The next prime is 173429. The reversal of 173428 is 824371.

173428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (173429) by changing a digit.

173428 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 651 + ... + 877.

It is an arithmetic number, because the mean of its divisors is an integer number (25536).

2¹⁷³⁴²⁸ is an apocalyptic number.

It is an amenable number.

173428 is a deficient number, since it is larger than the sum of its proper divisors (133004).

173428 is a wasteful number, since it uses less digits than its factorization.

173428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422 (or 420 counting only the distinct ones).

The product of its digits is 1344, while the sum is 25.

The square root of 173428 is about 416.4468753635. The cubic root of 173428 is about 55.7664593763.

Adding to 173428 its reverse (824371), we get a palindrome (997799).

The spelling of 173428 in words is "one hundred seventy-three thousand, four hundred twenty-eight".