128173306 has 8 divisors (see below), whose sum is σ = 192313044. Its totient is φ = 64068960.

The previous prime is 128173289. The next prime is 128173321. The reversal of 128173306 is 603371821.

It can be written as a sum of positive squares in 2 ways, for example, as 120802081 + 7371225 = 10991^2 + 2715^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3856 + ... + 16468.

Almost surely, 2^128173306 is an apocalyptic number.

128173306 is a deficient number, since it is larger than the sum of its proper divisors (64139738).

128173306 is a wasteful number, since it uses less digits than its factorization.

128173306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17696.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 128173306 is about 11321.3650237063. The cubic root of 128173306 is about 504.1957672553.

The spelling of 128173306 in words is "one hundred twenty-eight million, one hundred seventy-three thousand, three hundred six".