128684884 has 6 divisors (see below), whose sum is σ = 225198554. Its totient is φ = 64342440.

The previous prime is 128684879. The next prime is 128684887. The reversal of 128684884 is 488486821.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 117939600 + 10745284 = 10860^2 + 3278^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128684887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16085607 + ... + 16085614.

Almost surely, 2^128684884 is an apocalyptic number.

It is an amenable number.

128684884 is a deficient number, since it is larger than the sum of its proper divisors (96513670).

128684884 is a wasteful number, since it uses less digits than its factorization.

128684884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32171225 (or 32171223 counting only the distinct ones).

The product of its digits is 786432, while the sum is 49.

The square root of 128684884 is about 11343.9360012299. The cubic root of 128684884 is about 504.8656754791.

The spelling of 128684884 in words is "one hundred twenty-eight million, six hundred eighty-four thousand, eight hundred eighty-four".