171872768 has 20 divisors (see below), whose sum is σ = 343410870. Its totient is φ = 85936128.

The previous prime is 171872761. The next prime is 171872791. The reversal of 171872768 is 867278171.

It can be written as a sum of positive squares in only one way, i.e., 165071104 + 6801664 = 12848^2 + 2608^2 .

It is not an unprimeable number, because it can be changed into a prime (171872761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 167333 + ... + 168356.

Almost surely, 2^171872768 is an apocalyptic number.

It is an amenable number.

171872768 is a deficient number, since it is larger than the sum of its proper divisors (171538102).

171872768 is an frugal number, since it uses more digits than its factorization.

171872768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335707 (or 335691 counting only the distinct ones).

The product of its digits is 263424, while the sum is 47.

The square root of 171872768 is about 13110.0254767106. The cubic root of 171872768 is about 555.9926158811.

The spelling of 171872768 in words is "one hundred seventy-one million, eight hundred seventy-two thousand, seven hundred sixty-eight".