128784944 has 20 divisors (see below), whose sum is σ = 249697560. Its totient is φ = 64346880.

The previous prime is 128784941. The next prime is 128784949. The reversal of 128784944 is 449487821.

It is not an unprimeable number, because it can be changed into a prime (128784941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39704 + ... + 42824.

It is an arithmetic number, because the mean of its divisors is an integer number (12484878).

Almost surely, 2^128784944 is an apocalyptic number.

It is an amenable number.

128784944 is a deficient number, since it is larger than the sum of its proper divisors (120912616).

128784944 is a wasteful number, since it uses less digits than its factorization.

128784944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5708 (or 5702 counting only the distinct ones).

The product of its digits is 516096, while the sum is 47.

The square root of 128784944 is about 11348.3454300616. The cubic root of 128784944 is about 504.9964957441.

The spelling of 128784944 in words is "one hundred twenty-eight million, seven hundred eighty-four thousand, nine hundred forty-four".