128234440000 has 140 divisors (see below), whose sum is σ = 320496208384. Its totient is φ = 50887872000.

The previous prime is 128234439973. The next prime is 128234440003. The reversal of 128234440000 is 44432821.

It is a happy number.

It is a super-2 number, since 2×128234440000² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128234440003) 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 19 ways as a sum of consecutive naturals, for example, 5067379 + ... + 5092621.

Almost surely, 2^128234440000 is an apocalyptic number.

128234440000 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 128234440000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160248104192).

128234440000 is an abundant number, since it is smaller than the sum of its proper divisors (192261768384).

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

128234440000 is an equidigital number, since it uses as much as digits as its factorization.

128234440000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25402 (or 25377 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 128234440000 its reverse (44432821), we get a palindrome (128278872821).

The spelling of 128234440000 in words is "one hundred twenty-eight billion, two hundred thirty-four million, four hundred forty thousand".