128539296 has 72 divisors (see below), whose sum is σ = 368432064. Its totient is φ = 42506880.

The previous prime is 128539253. The next prime is 128539319. The reversal of 128539296 is 692935821.

128539296 is a `hidden beast` number, since 1 + 28 + 539 + 2 + 96 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

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, 36025 + ... + 39431.

It is an arithmetic number, because the mean of its divisors is an integer number (5117112).

Almost surely, 2^128539296 is an apocalyptic number.

128539296 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128539296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184216032).

128539296 is an abundant number, since it is smaller than the sum of its proper divisors (239892768).

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

128539296 is a wasteful number, since it uses less digits than its factorization.

128539296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3554 (or 3543 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 128539296 is about 11337.5171885206. The cubic root of 128539296 is about 504.6752099063.

The spelling of 128539296 in words is "one hundred twenty-eight million, five hundred thirty-nine thousand, two hundred ninety-six".