128578205 has 24 divisors (see below), whose sum is σ = 181675872. Its totient is φ = 87091872.

The previous prime is 128578201. The next prime is 128578217. The reversal of 128578205 is 502875821.

It is a happy number.

It is not a de Polignac number, because 128578205 - 2² = 128578201 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128578201) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 17174 + ... + 23496.

It is an arithmetic number, because the mean of its divisors is an integer number (7569828).

Almost surely, 2^128578205 is an apocalyptic number.

It is an amenable number.

128578205 is a deficient number, since it is larger than the sum of its proper divisors (53097667).

128578205 is an equidigital number, since it uses as much as digits as its factorization.

128578205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6425 (or 6418 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 38.

The square root of 128578205 is about 11339.2329987526. The cubic root of 128578205 is about 504.7261267007.

The spelling of 128578205 in words is "one hundred twenty-eight million, five hundred seventy-eight thousand, two hundred five".