128068605 has 54 divisors (see below), whose sum is σ = 259304058. Its totient is φ = 58302720.

The previous prime is 128068601. The next prime is 128068631. The reversal of 128068605 is 506860821.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 39162564 + 88906041 = 6258^2 + 9429^2 .

It is not a de Polignac number, because 128068605 - 2² = 128068601 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128068605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128068601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 531285 + ... + 531525.

It is an arithmetic number, because the mean of its divisors is an integer number (4801927).

Almost surely, 2^128068605 is an apocalyptic number.

128068605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128068605 is an abundant number, since it is smaller than the sum of its proper divisors (131235453).

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

128068605 is an equidigital number, since it uses as much as digits as its factorization.

128068605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507 (or 256 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 128068605 is about 11316.7400341264. The cubic root of 128068605 is about 504.0584422970.

The spelling of 128068605 in words is "one hundred twenty-eight million, sixty-eight thousand, six hundred five".