128170835 has 16 divisors (see below), whose sum is σ = 172839744. Its totient is φ = 90532992.

The previous prime is 128170829. The next prime is 128170877. The reversal of 128170835 is 538071821.

It is a cyclic number.

It is not a de Polignac number, because 128170835 - 2⁸ = 128170579 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128170795 and 128170804.

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 15 ways as a sum of consecutive naturals, for example, 41372 + ... + 44361.

It is an arithmetic number, because the mean of its divisors is an integer number (10802484).

Almost surely, 2^128170835 is an apocalyptic number.

128170835 is a deficient number, since it is larger than the sum of its proper divisors (44668909).

128170835 is a wasteful number, since it uses less digits than its factorization.

128170835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85774.

The product of its (nonzero) digits is 13440, while the sum is 35.

The square root of 128170835 is about 11321.2558932302. The cubic root of 128170835 is about 504.1925271741.

The spelling of 128170835 in words is "one hundred twenty-eight million, one hundred seventy thousand, eight hundred thirty-five".