173232720 has 120 divisors (see below), whose sum is σ = 616038696. Its totient is φ = 43474944.

The previous prime is 173232691. The next prime is 173232727. The reversal of 173232720 is 27232371.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 27499536 + 145733184 = 5244^2 + 12072^2 .

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (173232727) 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 23 ways as a sum of consecutive naturals, for example, 5164 + ... + 19316.

Almost surely, 2^173232720 is an apocalyptic number.

173232720 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 173232720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (308019348).

173232720 is an abundant number, since it is smaller than the sum of its proper divisors (442805976).

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

173232720 is a wasteful number, since it uses less digits than its factorization.

173232720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14189 (or 14180 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 27.

The square root of 173232720 is about 13161.7901517993. The cubic root of 173232720 is about 557.4552049646.

The spelling of 173232720 in words is "one hundred seventy-three million, two hundred thirty-two thousand, seven hundred twenty".