170320 has 20 divisors (see below), whose sum is σ = 396180. Its totient is φ = 68096.

The previous prime is 170299. The next prime is 170327. The reversal of 170320 is 23071.

It can be written as a sum of positive squares in 2 ways, for example, as 51984 + 118336 = 228^2 + 344^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 170320.

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 170320.

It is not an unprimeable number, because it can be changed into a prime (170327) by changing a digit.

170320 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 (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 985 + ... + 1144.

It is an arithmetic number, because the mean of its divisors is an integer number (19809).

2¹⁷⁰³²⁰ is an apocalyptic number.

170320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

170320 is an abundant number, since it is smaller than the sum of its proper divisors (225860).

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

170320 is a wasteful number, since it uses less digits than its factorization.

170320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2142 (or 2136 counting only the distinct ones).

The product of its (nonzero) digits is 42, while the sum is 13.

The square root of 170320 is about 412.6984371184. The cubic root of 170320 is about 55.4313194210.

Adding to 170320 its reverse (23071), we get a palindrome (193391).

The spelling of 170320 in words is "one hundred seventy thousand, three hundred twenty", and thus it is an iban number.