128384984 has 32 divisors (see below), whose sum is σ = 296274720. Its totient is φ = 50789376.

The previous prime is 128384959. The next prime is 128384989. The reversal of 128384984 is 489483821.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128384989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87449 + ... + 88904.

It is an arithmetic number, because the mean of its divisors is an integer number (9258585).

Almost surely, 2^128384984 is an apocalyptic number.

128384984 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

128384984 is an abundant number, since it is smaller than the sum of its proper divisors (167889736).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128384984 is a wasteful number, since it uses less digits than its factorization.

128384984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176379 (or 176375 counting only the distinct ones).

The product of its digits is 442368, while the sum is 47.

The square root of 128384984 is about 11330.7097747670. The cubic root of 128384984 is about 504.4731740871.

The spelling of 128384984 in words is "one hundred twenty-eight million, three hundred eighty-four thousand, nine hundred eighty-four".