128809082 has 8 divisors (see below), whose sum is σ = 193554900. Its totient is φ = 64290784.

The previous prime is 128809081. The next prime is 128809117. The reversal of 128809082 is 280908821.

It can be written as a sum of positive squares in 2 ways, for example, as 122301481 + 6507601 = 11059^2 + 2551^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (128809081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55457 + ... + 57732.

Almost surely, 2^128809082 is an apocalyptic number.

128809082 is a deficient number, since it is larger than the sum of its proper divisors (64745818).

128809082 is a wasteful number, since it uses less digits than its factorization.

128809082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113760.

The product of its (nonzero) digits is 18432, while the sum is 38.

The square root of 128809082 is about 11349.4088832855. The cubic root of 128809082 is about 505.0280440590.

It can be divided in two parts, 12880 and 9082, that multiplied together give a triangular number (116976160 = T₁₅₂₉₅).

The spelling of 128809082 in words is "one hundred twenty-eight million, eight hundred nine thousand, eighty-two".