170130728 has 16 divisors (see below), whose sum is σ = 329285760. Its totient is φ = 82321200.

The previous prime is 170130721. The next prime is 170130799. The reversal of 170130728 is 827031071.

170130728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 170130728.

It is not an unprimeable number, because it can be changed into a prime (170130721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 342758 + ... + 343253.

It is an arithmetic number, because the mean of its divisors is an integer number (20580360).

Almost surely, 2^170130728 is an apocalyptic number.

It is an amenable number.

170130728 is a deficient number, since it is larger than the sum of its proper divisors (159155032).

170130728 is a wasteful number, since it uses less digits than its factorization.

170130728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686048 (or 686044 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 29.

The square root of 170130728 is about 13043.4170369578. The cubic root of 170130728 is about 554.1077870270.

Adding to 170130728 its reverse (827031071), we get a palindrome (997161799).

The spelling of 170130728 in words is "one hundred seventy million, one hundred thirty thousand, seven hundred twenty-eight".