171970728 has 32 divisors (see below), whose sum is σ = 440415360. Its totient is φ = 55925120.

The previous prime is 171970727. The next prime is 171970751. The reversal of 171970728 is 827079171.

171970728 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 171970728.

It is not an unprimeable number, because it can be changed into a prime (171970727) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 86400 + ... + 88367.

It is an arithmetic number, because the mean of its divisors is an integer number (13762980).

Almost surely, 2^171970728 is an apocalyptic number.

It is an amenable number.

171970728 is an abundant number, since it is smaller than the sum of its proper divisors (268444632).

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

171970728 is a wasteful number, since it uses less digits than its factorization.

171970728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174817 (or 174813 counting only the distinct ones).

The product of its (nonzero) digits is 49392, while the sum is 42.

The square root of 171970728 is about 13113.7610165810. The cubic root of 171970728 is about 556.0982263529.

The spelling of 171970728 in words is "one hundred seventy-one million, nine hundred seventy thousand, seven hundred twenty-eight".