128840106 has 8 divisors (see below), whose sum is σ = 257680224. Its totient is φ = 42946700.

The previous prime is 128840099. The next prime is 128840141. The reversal of 128840106 is 601048821.

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

128840106 is an admirable 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 3 ways as a sum of consecutive naturals, for example, 10736670 + ... + 10736681.

It is an arithmetic number, because the mean of its divisors is an integer number (32210028).

Almost surely, 2^128840106 is an apocalyptic number.

128840106 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128840106 is a wasteful number, since it uses less digits than its factorization.

128840106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21473356.

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 128840106 is about 11350.7755682156. The cubic root of 128840106 is about 505.0685865738.

Adding to 128840106 its reverse (601048821), we get a palindrome (729888927).

The spelling of 128840106 in words is "one hundred twenty-eight million, eight hundred forty thousand, one hundred six".