128852775 has 120 divisors (see below), whose sum is σ = 267371280. Its totient is φ = 60963840.

The previous prime is 128852743. The next prime is 128852777. The reversal of 128852775 is 577258821.

It is not a de Polignac number, because 128852775 - 2⁵ = 128852743 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 128852775.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128852777) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 653977 + ... + 654173.

It is an arithmetic number, because the mean of its divisors is an integer number (2228094).

Almost surely, 2^128852775 is an apocalyptic number.

128852775 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128852775 is an abundant number, since it is smaller than the sum of its proper divisors (138518505).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128852775 is a wasteful number, since it uses less digits than its factorization.

128852775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255 (or 241 counting only the distinct ones).

The product of its digits is 313600, while the sum is 45.

The square root of 128852775 is about 11351.3336220904. Note that the first 3 decimals coincide. The cubic root of 128852775 is about 505.0851406950.

The spelling of 128852775 in words is "one hundred twenty-eight million, eight hundred fifty-two thousand, seven hundred seventy-five".