128982185 has 8 divisors (see below), whose sum is σ = 158962056. Its totient is φ = 100396800.

The previous prime is 128982181. The next prime is 128982197. The reversal of 128982185 is 581289821.

It can be written as a sum of positive squares in 4 ways, for example, as 63744256 + 65237929 = 7984^2 + 8077^2 .

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

It is not a de Polignac number, because 128982185 - 2² = 128982181 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128982181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 348416 + ... + 348785.

It is an arithmetic number, because the mean of its divisors is an integer number (19870257).

Almost surely, 2^128982185 is an apocalyptic number.

It is an amenable number.

128982185 is a deficient number, since it is larger than the sum of its proper divisors (29979871).

128982185 is an equidigital number, since it uses as much as digits as its factorization.

128982185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697243.

The product of its digits is 92160, while the sum is 44.

The square root of 128982185 is about 11357.0324028771. The cubic root of 128982185 is about 505.2541739149.

The spelling of 128982185 in words is "one hundred twenty-eight million, nine hundred eighty-two thousand, one hundred eighty-five".