128028340057 has 8 divisors (see below), whose sum is σ = 128896989984. Its totient is φ = 127160705088.

The previous prime is 128028340039. The next prime is 128028340117. The reversal of 128028340057 is 750043820821.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128028340057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128028340457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 258 + ... + 506020.

It is an arithmetic number, because the mean of its divisors is an integer number (16112123748).

Almost surely, 2^128028340057 is an apocalyptic number.

It is an amenable number.

128028340057 is a deficient number, since it is larger than the sum of its proper divisors (868649927).

128028340057 is a wasteful number, since it uses less digits than its factorization.

128028340057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507479.

The product of its (nonzero) digits is 107520, while the sum is 40.

The spelling of 128028340057 in words is "one hundred twenty-eight billion, twenty-eight million, three hundred forty thousand, fifty-seven".