172306328 has 16 divisors (see below), whose sum is σ = 326040000. Its totient is φ = 85362336.

The previous prime is 172306327. The next prime is 172306349. The reversal of 172306328 is 823603271.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 172306294 and 172306303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172306327) 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, 97928 + ... + 99671.

It is an arithmetic number, because the mean of its divisors is an integer number (20377500).

Almost surely, 2^172306328 is an apocalyptic number.

It is an amenable number.

172306328 is a deficient number, since it is larger than the sum of its proper divisors (153733672).

172306328 is a wasteful number, since it uses less digits than its factorization.

172306328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197714 (or 197710 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 172306328 is about 13126.5504988935. The cubic root of 172306328 is about 556.4597322482.

Adding to 172306328 its reverse (823603271), we get a palindrome (995909599).

The spelling of 172306328 in words is "one hundred seventy-two million, three hundred six thousand, three hundred twenty-eight".