128884165 has 8 divisors (see below), whose sum is σ = 154734840. Its totient is φ = 103058112.

The previous prime is 128884159. The next prime is 128884169. The reversal of 128884165 is 561488821.

It can be written as a sum of positive squares in 4 ways, for example, as 14265729 + 114618436 = 3777^2 + 10706^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 128884165 - 2⁷ = 128884037 is a prime.

It is a super-2 number, since 2×128884165² = 33222255975494450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128884169) 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 7 ways as a sum of consecutive naturals, for example, 8571 + ... + 18199.

It is an arithmetic number, because the mean of its divisors is an integer number (19341855).

Almost surely, 2^128884165 is an apocalyptic number.

It is an amenable number.

128884165 is a deficient number, since it is larger than the sum of its proper divisors (25850675).

128884165 is an equidigital number, since it uses as much as digits as its factorization.

128884165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12311.

The product of its digits is 122880, while the sum is 43.

The square root of 128884165 is about 11352.7161948143. The cubic root of 128884165 is about 505.1261521912.

The spelling of 128884165 in words is "one hundred twenty-eight million, eight hundred eighty-four thousand, one hundred sixty-five".