128772106 has 8 divisors (see below), whose sum is σ = 194009760. Its totient is φ = 64102188.

The previous prime is 128772079. The next prime is 128772121. The reversal of 128772106 is 601277821.

It is a happy number.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141366 + ... + 142273.

It is an arithmetic number, because the mean of its divisors is an integer number (24251220).

Almost surely, 2^128772106 is an apocalyptic number.

128772106 is a deficient number, since it is larger than the sum of its proper divisors (65237654).

128772106 is a wasteful number, since it uses less digits than its factorization.

128772106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283868.

The product of its (nonzero) digits is 9408, while the sum is 34.

The square root of 128772106 is about 11347.7797828474. The cubic root of 128772106 is about 504.9797148993.

The spelling of 128772106 in words is "one hundred twenty-eight million, seven hundred seventy-two thousand, one hundred six".