128023489792 has 72 divisors (see below), whose sum is σ = 280224060480. Its totient is φ = 57890734080.

The previous prime is 128023489787. The next prime is 128023489799. The reversal of 128023489792 is 297984320821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128023489799) 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, 425709 + ... + 661267.

It is an arithmetic number, because the mean of its divisors is an integer number (3892000840).

Almost surely, 2^128023489792 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128023489792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140112030240).

128023489792 is an abundant number, since it is smaller than the sum of its proper divisors (152200570688).

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

128023489792 is a wasteful number, since it uses less digits than its factorization.

128023489792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235779 (or 235765 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 55.

The spelling of 128023489792 in words is "one hundred twenty-eight billion, twenty-three million, four hundred eighty-nine thousand, seven hundred ninety-two".