128820935 has 8 divisors (see below), whose sum is σ = 154827936. Its totient is φ = 102894880.

The previous prime is 128820877. The next prime is 128820941. The reversal of 128820935 is 539028821.

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

It is not a de Polignac number, because 128820935 - 2¹⁸ = 128558791 is a prime.

It is a Duffinian number.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 16676 + ... + 23145.

It is an arithmetic number, because the mean of its divisors is an integer number (19353492).

Almost surely, 2^128820935 is an apocalyptic number.

128820935 is a deficient number, since it is larger than the sum of its proper divisors (26007001).

128820935 is an equidigital number, since it uses as much as digits as its factorization.

128820935 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40473.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 128820935 is about 11349.9310570593. The cubic root of 128820935 is about 505.0435344621.

The spelling of 128820935 in words is "one hundred twenty-eight million, eight hundred twenty thousand, nine hundred thirty-five".