128404035 has 20 divisors (see below), whose sum is σ = 230176848. Its totient is φ = 68481936.

The previous prime is 128404021. The next prime is 128404037. The reversal of 128404035 is 530404821.

It is not a de Polignac number, because 128404035 - 2⁴ = 128404019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (128404037) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 158119 + ... + 158928.

Almost surely, 2^128404035 is an apocalyptic number.

128404035 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128404035 is a deficient number, since it is larger than the sum of its proper divisors (101772813).

128404035 is an equidigital number, since it uses as much as digits as its factorization.

128404035 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317064 (or 317055 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 128404035 is about 11331.5504234857. The cubic root of 128404035 is about 504.4981257152.

Adding to 128404035 its reverse (530404821), we get a palindrome (658808856).

The spelling of 128404035 in words is "one hundred twenty-eight million, four hundred four thousand, thirty-five".