128008605 has 16 divisors (see below), whose sum is σ = 215593920. Its totient is φ = 64677888.

The previous prime is 128008591. The next prime is 128008607. The reversal of 128008605 is 506800821.

It is not a de Polignac number, because 128008605 - 2⁹ = 128008093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128008607) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 224292 + ... + 224861.

It is an arithmetic number, because the mean of its divisors is an integer number (13474620).

Almost surely, 2^128008605 is an apocalyptic number.

128008605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128008605 is a deficient number, since it is larger than the sum of its proper divisors (87585315).

128008605 is a wasteful number, since it uses less digits than its factorization.

128008605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449180.

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 128008605 is about 11314.0887834593. The cubic root of 128008605 is about 503.9797130597.

The spelling of 128008605 in words is "one hundred twenty-eight million, eight thousand, six hundred five".