172730132 has 24 divisors (see below), whose sum is σ = 323666280. Its totient is φ = 80368640.

The previous prime is 172730113. The next prime is 172730137. The reversal of 172730132 is 231037271.

It can be written as a sum of positive squares in 4 ways, for example, as 9759376 + 162970756 = 3124^2 + 12766^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172730137) 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 7 ways as a sum of consecutive naturals, for example, 8219 + ... + 20322.

It is an arithmetic number, because the mean of its divisors is an integer number (13486095).

Almost surely, 2^172730132 is an apocalyptic number.

It is an amenable number.

172730132 is a deficient number, since it is larger than the sum of its proper divisors (150936148).

172730132 is a wasteful number, since it uses less digits than its factorization.

172730132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28651 (or 28649 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 26.

The square root of 172730132 is about 13142.6835920218. The cubic root of 172730132 is about 556.9155808099.

The spelling of 172730132 in words is "one hundred seventy-two million, seven hundred thirty thousand, one hundred thirty-two".