128664584 has 16 divisors (see below), whose sum is σ = 241371900. Its totient is φ = 64298752.

The previous prime is 128664559. The next prime is 128664623. The reversal of 128664584 is 485466821.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 87422500 + 41242084 = 9350^2 + 6422^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21044 + ... + 26460.

Almost surely, 2^128664584 is an apocalyptic number.

It is an amenable number.

128664584 is a deficient number, since it is larger than the sum of its proper divisors (112707316).

128664584 is a wasteful number, since it uses less digits than its factorization.

128664584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8392 (or 8388 counting only the distinct ones).

The product of its digits is 368640, while the sum is 44.

The square root of 128664584 is about 11343.0412147713. The cubic root of 128664584 is about 504.8391266158.

The spelling of 128664584 in words is "one hundred twenty-eight million, six hundred sixty-four thousand, five hundred eighty-four".