128319775 has 12 divisors (see below), whose sum is σ = 159836992. Its totient is φ = 102191040.

The previous prime is 128319767. The next prime is 128319781. The reversal of 128319775 is 577913821.

It is not a de Polignac number, because 128319775 - 2³ = 128319767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 5934 + ... + 17083.

Almost surely, 2^128319775 is an apocalyptic number.

128319775 is a deficient number, since it is larger than the sum of its proper divisors (31517217).

128319775 is a wasteful number, since it uses less digits than its factorization.

128319775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23250 (or 23245 counting only the distinct ones).

The product of its digits is 105840, while the sum is 43.

The square root of 128319775 is about 11327.8318755179. The cubic root of 128319775 is about 504.3877493454.

The spelling of 128319775 in words is "one hundred twenty-eight million, three hundred nineteen thousand, seven hundred seventy-five".