128395575 has 72 divisors (see below), whose sum is σ = 286755456. Its totient is φ = 53352000.

The previous prime is 128395573. The next prime is 128395609. The reversal of 128395575 is 575593821.

128395575 is a `hidden beast` number, since 12 + 83 + 9 + 557 + 5 = 666.

It is not a de Polignac number, because 128395575 - 2¹ = 128395573 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 128395575.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128395571) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 13620 + ... + 21030.

Almost surely, 2^128395575 is an apocalyptic number.

128395575 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128395575 is an abundant number, since it is smaller than the sum of its proper divisors (158359881).

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

128395575 is a wasteful number, since it uses less digits than its factorization.

128395575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7445 (or 7437 counting only the distinct ones).

The product of its digits is 378000, while the sum is 45.

The square root of 128395575 is about 11331.1771233178. The cubic root of 128395575 is about 504.4870457210.

The spelling of 128395575 in words is "one hundred twenty-eight million, three hundred ninety-five thousand, five hundred seventy-five".