128088785 has 32 divisors (see below), whose sum is σ = 178139520. Its totient is φ = 88165440.

The previous prime is 128088781. The next prime is 128088799. The reversal of 128088785 is 587880821.

It is not a de Polignac number, because 128088785 - 2² = 128088781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128088781) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 125939 + ... + 126951.

It is an arithmetic number, because the mean of its divisors is an integer number (5566860).

Almost surely, 2^128088785 is an apocalyptic number.

It is an amenable number.

128088785 is a deficient number, since it is larger than the sum of its proper divisors (50050735).

128088785 is a wasteful number, since it uses less digits than its factorization.

128088785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1070 (or 1048 counting only the distinct ones).

The product of its (nonzero) digits is 286720, while the sum is 47.

The square root of 128088785 is about 11317.6315985280. The cubic root of 128088785 is about 504.0849160378.

The spelling of 128088785 in words is "one hundred twenty-eight million, eighty-eight thousand, seven hundred eighty-five".