173085220 has 96 divisors (see below), whose sum is σ = 459841536. Its totient is φ = 53155200.

The previous prime is 173085181. The next prime is 173085221. The reversal of 173085220 is 22580371.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (173085221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 108549 + ... + 110131.

It is an arithmetic number, because the mean of its divisors is an integer number (4790016).

Almost surely, 2^173085220 is an apocalyptic number.

173085220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 173085220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (229920768).

173085220 is an abundant number, since it is smaller than the sum of its proper divisors (286756316).

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

173085220 is a wasteful number, since it uses less digits than its factorization.

173085220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1681 (or 1679 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 173085220 is about 13156.1856174197. The cubic root of 173085220 is about 557.2969438873.

The spelling of 173085220 in words is "one hundred seventy-three million, eighty-five thousand, two hundred twenty".