128835311 has 4 divisors (see below), whose sum is σ = 140547624. Its totient is φ = 117123000.

The previous prime is 128835307. The next prime is 128835337. The reversal of 128835311 is 113538821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 113538821 = 11 ⋅10321711.

It is a cyclic number.

It is not a de Polignac number, because 128835311 - 2² = 128835307 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128835341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5856140 + ... + 5856161.

It is an arithmetic number, because the mean of its divisors is an integer number (35136906).

Almost surely, 2^128835311 is an apocalyptic number.

128835311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

128835311 is a deficient number, since it is larger than the sum of its proper divisors (11712313).

128835311 is a wasteful number, since it uses less digits than its factorization.

128835311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11712312.

The product of its digits is 5760, while the sum is 32.

The square root of 128835311 is about 11350.5643472032. The cubic root of 128835311 is about 505.0623208387.

The spelling of 128835311 in words is "one hundred twenty-eight million, eight hundred thirty-five thousand, three hundred eleven".