128806335 has 32 divisors (see below), whose sum is σ = 261703680. Its totient is φ = 58882464.

The previous prime is 128806303. The next prime is 128806343. The reversal of 128806335 is 533608821.

128806335 is a `hidden beast` number, since 12 + 8 + 8 + 0 + 633 + 5 = 666.

It is not a de Polignac number, because 128806335 - 2⁵ = 128806303 is a prime.

It is a super-2 number, since 2×128806335² = 33182143872264450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 128806335.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 67207 + ... + 69096.

It is an arithmetic number, because the mean of its divisors is an integer number (8178240).

Almost surely, 2^128806335 is an apocalyptic number.

128806335 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128806335 is an abundant number, since it is smaller than the sum of its proper divisors (132897345).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128806335 is a wasteful number, since it uses less digits than its factorization.

128806335 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136324 (or 136318 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 128806335 is about 11349.2878631216. The cubic root of 128806335 is about 505.0244539346.

The spelling of 128806335 in words is "one hundred twenty-eight million, eight hundred six thousand, three hundred thirty-five".