19128589128 has 128 divisors (see below), whose sum is σ = 59059497600. Its totient is φ = 5687136000.

The previous prime is 19128589097. The next prime is 19128589187. The reversal of 19128589128 is 82198582191.

19128589128 is a `hidden beast` number, since 19 + 1 + 28 + 589 + 1 + 28 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49978 + ... + 201878.

It is an arithmetic number, because the mean of its divisors is an integer number (461402325).

Almost surely, 2^19128589128 is an apocalyptic number.

19128589128 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 19128589128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29529748800).

19128589128 is an abundant number, since it is smaller than the sum of its proper divisors (39930908472).

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

19128589128 is a wasteful number, since it uses less digits than its factorization.

19128589128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151980 (or 151970 counting only the distinct ones).

The product of its digits is 829440, while the sum is 54.

The spelling of 19128589128 in words is "nineteen billion, one hundred twenty-eight million, five hundred eighty-nine thousand, one hundred twenty-eight".