128828766 has 16 divisors (see below), whose sum is σ = 281081088. Its totient is φ = 39039000.

The previous prime is 128828761. The next prime is 128828779. The reversal of 128828766 is 667828821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128828761) 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 7 ways as a sum of consecutive naturals, for example, 975910 + ... + 976041.

It is an arithmetic number, because the mean of its divisors is an integer number (17567568).

Almost surely, 2^128828766 is an apocalyptic number.

128828766 is an abundant number, since it is smaller than the sum of its proper divisors (152252322).

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

128828766 is a wasteful number, since it uses less digits than its factorization.

128828766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1951967.

The product of its digits is 516096, while the sum is 48.

The square root of 128828766 is about 11350.2760318857. The cubic root of 128828766 is about 505.0537680881.

The spelling of 128828766 in words is "one hundred twenty-eight million, eight hundred twenty-eight thousand, seven hundred sixty-six".