128230881240 has 576 divisors, whose sum is σ = 504681684480. Its totient is φ = 25773350400.

The previous prime is 128230881211. The next prime is 128230881277. The reversal of 128230881240 is 42188032821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 62156449 + ... + 62158511.

It is an arithmetic number, because the mean of its divisors is an integer number (876183480).

Almost surely, 2^128230881240 is an apocalyptic number.

128230881240 is a gapful number since it is divisible by the number (10) 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 128230881240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (252340842240).

128230881240 is an abundant number, since it is smaller than the sum of its proper divisors (376450803240).

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

128230881240 is a wasteful number, since it uses less digits than its factorization.

128230881240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2164 (or 2122 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 39.

The spelling of 128230881240 in words is "one hundred twenty-eight billion, two hundred thirty million, eight hundred eighty-one thousand, two hundred forty".