128783044 has 12 divisors (see below), whose sum is σ = 242706604. Its totient is φ = 59438304.

The previous prime is 128783033. The next prime is 128783047. The reversal of 128783044 is 440387821.

It can be written as a sum of positive squares in 2 ways, for example, as 38912644 + 89870400 = 6238^2 + 9480^2 .

It is a junction number, because it is equal to n+sod(n) for n = 128782994 and 128783012.

It is not an unprimeable number, because it can be changed into a prime (128783047) 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 3 ways as a sum of consecutive naturals, for example, 1238247 + ... + 1238350.

Almost surely, 2^128783044 is an apocalyptic number.

It is an amenable number.

128783044 is a deficient number, since it is larger than the sum of its proper divisors (113923560).

128783044 is a wasteful number, since it uses less digits than its factorization.

128783044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2476614 (or 2476612 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 37.

The square root of 128783044 is about 11348.2617171089. The cubic root of 128783044 is about 504.9940122807.

The spelling of 128783044 in words is "one hundred twenty-eight million, seven hundred eighty-three thousand, forty-four".