128652889 has 8 divisors (see below), whose sum is σ = 138791880. Its totient is φ = 118799616.

The previous prime is 128652877. The next prime is 128652899. The reversal of 128652889 is 988256821.

It can be written as a sum of positive squares in 4 ways, for example, as 67108864 + 61544025 = 8192^2 + 7845^2 .

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 128652889 - 2⁷ = 128652761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128652829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70494 + ... + 72295.

It is an arithmetic number, because the mean of its divisors is an integer number (17348985).

Almost surely, 2^128652889 is an apocalyptic number.

It is an amenable number.

128652889 is a deficient number, since it is larger than the sum of its proper divisors (10138991).

128652889 is a wasteful number, since it uses less digits than its factorization.

128652889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142859.

The product of its digits is 552960, while the sum is 49.

The square root of 128652889 is about 11342.5256887520. The cubic root of 128652889 is about 504.8238303255.

The spelling of 128652889 in words is "one hundred twenty-eight million, six hundred fifty-two thousand, eight hundred eighty-nine".