128835 has 24 divisors (see below), whose sum is σ = 255840. Its totient is φ = 58752.

The previous prime is 128833. The next prime is 128837. The reversal of 128835 is 538821.

128835 = 34³ + 35³ + 36³.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (128833) and next prime (128837).

It is not a de Polignac number, because 128835 - 2¹ = 128833 is a prime.

It is a nialpdrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 128799 and 128808.

It is not an unprimeable number, because it can be changed into a prime (128831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 111 + ... + 519.

It is an arithmetic number, because the mean of its divisors is an integer number (10660).

2¹²⁸⁸³⁵ is an apocalyptic number.

128835 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128835 is a deficient number, since it is larger than the sum of its proper divisors (127005).

128835 is a wasteful number, since it uses less digits than its factorization.

128835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427 (or 424 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 128835 is about 358.9359274300. The cubic root of 128835 is about 50.5061914443.

The spelling of 128835 in words is "one hundred twenty-eight thousand, eight hundred thirty-five".