128843023784 has 16 divisors (see below), whose sum is σ = 241644822900. Its totient is φ = 64404404352.

The previous prime is 128843023769. The next prime is 128843023787. The reversal of 128843023784 is 487320348821.

It can be written as a sum of positive squares in 2 ways, for example, as 94939166884 + 33903856900 = 308122^2 + 184130^2 .

It is not an unprimeable number, because it can be changed into a prime (128843023787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2106407 + ... + 2166710.

Almost surely, 2^128843023784 is an apocalyptic number.

It is an amenable number.

128843023784 is a deficient number, since it is larger than the sum of its proper divisors (112801799116).

128843023784 is a wasteful number, since it uses less digits than its factorization.

128843023784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4276892 (or 4276888 counting only the distinct ones).

The product of its (nonzero) digits is 2064384, while the sum is 50.

The spelling of 128843023784 in words is "one hundred twenty-eight billion, eight hundred forty-three million, twenty-three thousand, seven hundred eighty-four".