170472728 has 16 divisors (see below), whose sum is σ = 320355000. Its totient is φ = 85044736.

The previous prime is 170472707. The next prime is 170472733. The reversal of 170472728 is 827274071.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 170472691 and 170472700.

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 3 ways as a sum of consecutive naturals, for example, 20138 + ... + 27321.

Almost surely, 2^170472728 is an apocalyptic number.

It is an amenable number.

170472728 is a deficient number, since it is larger than the sum of its proper divisors (149882272).

170472728 is a wasteful number, since it uses less digits than its factorization.

170472728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47914 (or 47910 counting only the distinct ones).

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

The square root of 170472728 is about 13056.5205165848. The cubic root of 170472728 is about 554.4788311547.

The spelling of 170472728 in words is "one hundred seventy million, four hundred seventy-two thousand, seven hundred twenty-eight".