128178845 has 8 divisors (see below), whose sum is σ = 161910240. Its totient is φ = 97146000.

The previous prime is 128178803. The next prime is 128178851. The reversal of 128178845 is 548871821.

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

It is not a de Polignac number, because 128178845 - 2¹² = 128174749 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 128178796 and 128178805.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 674531 + ... + 674720.

It is an arithmetic number, because the mean of its divisors is an integer number (20238780).

Almost surely, 2^128178845 is an apocalyptic number.

It is an amenable number.

128178845 is a deficient number, since it is larger than the sum of its proper divisors (33731395).

128178845 is a wasteful number, since it uses less digits than its factorization.

128178845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1349275.

The product of its digits is 143360, while the sum is 44.

The square root of 128178845 is about 11321.6096470422. The cubic root of 128178845 is about 504.2030300784.

The spelling of 128178845 in words is "one hundred twenty-eight million, one hundred seventy-eight thousand, eight hundred forty-five".