128031826 has 16 divisors (see below), whose sum is σ = 208215000. Its totient is φ = 58693248.

The previous prime is 128031821. The next prime is 128031833. The reversal of 128031826 is 628130821.

It can be written as a sum of positive squares in 4 ways, for example, as 19351201 + 108680625 = 4399^2 + 10425^2 .

It is not an unprimeable number, because it can be changed into a prime (128031821) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 12651 + ... + 20398.

Almost surely, 2^128031826 is an apocalyptic number.

128031826 is a deficient number, since it is larger than the sum of its proper divisors (80183174).

128031826 is a wasteful number, since it uses less digits than its factorization.

128031826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33213.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 128031826 is about 11315.1149353420. The cubic root of 128031826 is about 504.0101855042.

The spelling of 128031826 in words is "one hundred twenty-eight million, thirty-one thousand, eight hundred twenty-six".