128739384 has 48 divisors (see below), whose sum is σ = 349549200. Its totient is φ = 42804864.

The previous prime is 128739379. The next prime is 128739389. The reversal of 128739384 is 483937821.

It is an interprime number because it is at equal distance from previous prime (128739379) and next prime (128739389).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128739389) 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 11 ways as a sum of consecutive naturals, for example, 29572 + ... + 33644.

It is an arithmetic number, because the mean of its divisors is an integer number (7282275).

Almost surely, 2^128739384 is an apocalyptic number.

It is an amenable number.

128739384 is an abundant number, since it is smaller than the sum of its proper divisors (220809816).

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

128739384 is a wasteful number, since it uses less digits than its factorization.

128739384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4524 (or 4517 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 128739384 is about 11346.3379114144. The cubic root of 128739384 is about 504.9369381765.

The spelling of 128739384 in words is "one hundred twenty-eight million, seven hundred thirty-nine thousand, three hundred eighty-four".