172028 has 12 divisors (see below), whose sum is σ = 311640. Its totient is φ = 82992.

The previous prime is 172027. The next prime is 172031. The reversal of 172028 is 820271.

It is a plaindrome in base 14.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 172028.

It is not an unprimeable number, because it can be changed into a prime (172021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 626 + ... + 857.

It is an arithmetic number, because the mean of its divisors is an integer number (25970).

2¹⁷²⁰²⁸ is an apocalyptic number.

It is an amenable number.

172028 is a deficient number, since it is larger than the sum of its proper divisors (139612).

172028 is a wasteful number, since it uses less digits than its factorization.

172028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1516 (or 1514 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 172028 is about 414.7625826904. The cubic root of 172028 is about 55.6159952600.

Adding to 172028 its reverse (820271), we get a palindrome (992299).

The spelling of 172028 in words is "one hundred seventy-two thousand, twenty-eight".