170728030 has 32 divisors (see below), whose sum is σ = 337724640. Its totient is φ = 61624320.

The previous prime is 170728007. The next prime is 170728031. The reversal of 170728030 is 30827071.

It is a happy number.

170728030 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 170728030.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (170728031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9406 + ... + 20734.

It is an arithmetic number, because the mean of its divisors is an integer number (10553895).

Almost surely, 2^170728030 is an apocalyptic number.

170728030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

170728030 is a deficient number, since it is larger than the sum of its proper divisors (166996610).

170728030 is a wasteful number, since it uses less digits than its factorization.

170728030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11484.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 170728030 is about 13066.2936596420. The cubic root of 170728030 is about 554.7554911379.

The spelling of 170728030 in words is "one hundred seventy million, seven hundred twenty-eight thousand, thirty".