628173 has 36 divisors (see below), whose sum is σ = 1141920. Its totient is φ = 325728.

The previous prime is 628171. The next prime is 628183. The reversal of 628173 is 371826.

It is not a de Polignac number, because 628173 - 2¹ = 628171 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628171) 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 35 ways as a sum of consecutive naturals, for example, 10618 + ... + 10676.

It is an arithmetic number, because the mean of its divisors is an integer number (31720).

2⁶²⁸¹⁷³ is an apocalyptic number.

628173 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

It is an amenable number.

628173 is a deficient number, since it is larger than the sum of its proper divisors (513747).

628173 is a wasteful number, since it uses less digits than its factorization.

628173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98 (or 82 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 628173 is about 792.5736558832. The cubic root of 628173 is about 85.6432399383.

Adding to 628173 its reverse (371826), we get a palindrome (999999).

The spelling of 628173 in words is "six hundred twenty-eight thousand, one hundred seventy-three".