128812739328 has 216 divisors, whose sum is σ = 457107062048. Its totient is φ = 33972535296.

The previous prime is 128812739317. The next prime is 128812739347. The reversal of 128812739328 is 823937218821.

128812739328 is a `hidden beast` number, since 1 + 288 + 1 + 2 + 7 + 39 + 328 = 666.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 97525 + ... + 516852.

Almost surely, 2^128812739328 is an apocalyptic number.

128812739328 is a gapful number since it is divisible by the number (18) 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 128812739328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (228553531024).

128812739328 is an abundant number, since it is smaller than the sum of its proper divisors (328294322720).

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

128812739328 is a wasteful number, since it uses less digits than its factorization.

128812739328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614419 (or 614402 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The spelling of 128812739328 in words is "one hundred twenty-eight billion, eight hundred twelve million, seven hundred thirty-nine thousand, three hundred twenty-eight".