128390075 has 18 divisors (see below), whose sum is σ = 174996612. Its totient is φ = 93372400.

The previous prime is 128390057. The next prime is 128390113. The reversal of 128390075 is 570093821.

It is not a de Polignac number, because 128390075 - 2²⁶ = 61281211 is a prime.

It is a super-2 number, since 2×128390075² = 32968022717011250, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 17 ways as a sum of consecutive naturals, for example, 18197 + ... + 24246.

It is an arithmetic number, because the mean of its divisors is an integer number (9722034).

Almost surely, 2^128390075 is an apocalyptic number.

128390075 is a deficient number, since it is larger than the sum of its proper divisors (46606537).

128390075 is a wasteful number, since it uses less digits than its factorization.

128390075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42475 (or 42459 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 128390075 is about 11330.9344274866. The cubic root of 128390075 is about 504.4798421540.

The spelling of 128390075 in words is "one hundred twenty-eight million, three hundred ninety thousand, seventy-five".