128828356 has 12 divisors (see below), whose sum is σ = 228538492. Its totient is φ = 63531648.

The previous prime is 128828351. The next prime is 128828407. The reversal of 128828356 is 653828821.

It can be written as a sum of positive squares in 2 ways, for example, as 36360900 + 92467456 = 6030^2 + 9616^2 .

It is not an unprimeable number, because it can be changed into a prime (128828351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220305 + ... + 220888.

Almost surely, 2^128828356 is an apocalyptic number.

It is an amenable number.

128828356 is a deficient number, since it is larger than the sum of its proper divisors (99710136).

128828356 is a wasteful number, since it uses less digits than its factorization.

128828356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441270 (or 441268 counting only the distinct ones).

The product of its digits is 184320, while the sum is 43.

The square root of 128828356 is about 11350.2579706366. The cubic root of 128828356 is about 505.0532323064.

The spelling of 128828356 in words is "one hundred twenty-eight million, eight hundred twenty-eight thousand, three hundred fifty-six".