128031788023440 has 320 divisors, whose sum is σ = 473380991963136. Its totient is φ = 27988436146176.

The previous prime is 128031788023393. The next prime is 128031788023453. The reversal of 128031788023440 is 44320887130821.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 305316954 + ... + 305736006.

Almost surely, 2^{128031788023440} is an apocalyptic number.

128031788023440 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 128031788023440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236690495981568).

128031788023440 is an abundant number, since it is smaller than the sum of its proper divisors (345349203939696).

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

128031788023440 is a wasteful number, since it uses less digits than its factorization.

128031788023440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427006 (or 427000 counting only the distinct ones).

The product of its (nonzero) digits is 2064384, while the sum is 51.

The spelling of 128031788023440 in words is "one hundred twenty-eight trillion, thirty-one billion, seven hundred eighty-eight million, twenty-three thousand, four hundred forty".