128836005 has 16 divisors (see below), whose sum is σ = 208141440. Its totient is φ = 68044608.

The previous prime is 128835997. The next prime is 128836051. The reversal of 128836005 is 500638821.

It is a happy number.

It is not a de Polignac number, because 128836005 - 2³ = 128835997 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40150 + ... + 43239.

It is an arithmetic number, because the mean of its divisors is an integer number (13008840).

Almost surely, 2^128836005 is an apocalyptic number.

128836005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128836005 is a deficient number, since it is larger than the sum of its proper divisors (79305435).

128836005 is a wasteful number, since it uses less digits than its factorization.

128836005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83500.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 128836005 is about 11350.5949183292. The cubic root of 128836005 is about 505.0632277138.

The spelling of 128836005 in words is "one hundred twenty-eight million, eight hundred thirty-six thousand, five".