172728411 has 16 divisors (see below), whose sum is σ = 243411840. Its totient is φ = 108648000.

The previous prime is 172728403. The next prime is 172728419. The reversal of 172728411 is 114827271.

It is an interprime number because it is at equal distance from previous prime (172728403) and next prime (172728419).

It is not a de Polignac number, because 172728411 - 2³ = 172728403 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172728419) 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 15 ways as a sum of consecutive naturals, for example, 8271 + ... + 20343.

It is an arithmetic number, because the mean of its divisors is an integer number (15213240).

Almost surely, 2^172728411 is an apocalyptic number.

172728411 is a deficient number, since it is larger than the sum of its proper divisors (70683429).

172728411 is a wasteful number, since it uses less digits than its factorization.

172728411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12346.

The product of its digits is 6272, while the sum is 33.

The square root of 172728411 is about 13142.6181181681. The cubic root of 172728411 is about 556.9137311907.

The spelling of 172728411 in words is "one hundred seventy-two million, seven hundred twenty-eight thousand, four hundred eleven".