171493728 has 72 divisors (see below), whose sum is σ = 523682712. Its totient is φ = 48996864.

The previous prime is 171493711. The next prime is 171493759. The reversal of 171493728 is 827394171.

171493728 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 171493728.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13525 + ... + 22932.

It is an arithmetic number, because the mean of its divisors is an integer number (7273371).

Almost surely, 2^171493728 is an apocalyptic number.

It is an amenable number.

171493728 is an abundant number, since it is smaller than the sum of its proper divisors (352188984).

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

171493728 is a wasteful number, since it uses less digits than its factorization.

171493728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36484 (or 36469 counting only the distinct ones).

The product of its digits is 84672, while the sum is 42.

The square root of 171493728 is about 13095.5613854466. The cubic root of 171493728 is about 555.5835951951.

The spelling of 171493728 in words is "one hundred seventy-one million, four hundred ninety-three thousand, seven hundred twenty-eight".