170427728 has 10 divisors (see below), whose sum is σ = 330203754. Its totient is φ = 85213856.

The previous prime is 170427683. The next prime is 170427731. The reversal of 170427728 is 827724071.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 161594944 + 8832784 = 12712^2 + 2972^2 .

It is a super-2 number, since 2×170427728² = 58091220942483968, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 170427691 and 170427700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5325851 + ... + 5325882.

Almost surely, 2^170427728 is an apocalyptic number.

It is an amenable number.

170427728 is a deficient number, since it is larger than the sum of its proper divisors (159776026).

170427728 is a wasteful number, since it uses less digits than its factorization.

170427728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10651741 (or 10651735 counting only the distinct ones).

The product of its (nonzero) digits is 43904, while the sum is 38.

The square root of 170427728 is about 13054.7971259610. The cubic root of 170427728 is about 554.4300379284.

The spelling of 170427728 in words is "one hundred seventy million, four hundred twenty-seven thousand, seven hundred twenty-eight".