128783075 has 12 divisors (see below), whose sum is σ = 169085160. Its totient is φ = 96965760.

The previous prime is 128783071. The next prime is 128783093. The reversal of 128783075 is 570387821.

It is not a de Polignac number, because 128783075 - 2² = 128783071 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128783071) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 151085 + ... + 151934.

It is an arithmetic number, because the mean of its divisors is an integer number (14090430).

Almost surely, 2^128783075 is an apocalyptic number.

128783075 is a deficient number, since it is larger than the sum of its proper divisors (40302085).

128783075 is a wasteful number, since it uses less digits than its factorization.

128783075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303046 (or 303041 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 41.

The square root of 128783075 is about 11348.2630829568. The cubic root of 128783075 is about 504.9940528006.

The spelling of 128783075 in words is "one hundred twenty-eight million, seven hundred eighty-three thousand, seventy-five".