128081382 has 48 divisors (see below), whose sum is σ = 302626368. Its totient is φ = 35823840.

The previous prime is 128081377. The next prime is 128081407. The reversal of 128081382 is 283180821.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5413 + ... + 16895.

It is an arithmetic number, because the mean of its divisors is an integer number (6304716).

Almost surely, 2^128081382 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128081382, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151313184).

128081382 is an abundant number, since it is smaller than the sum of its proper divisors (174544986).

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

128081382 is a wasteful number, since it uses less digits than its factorization.

128081382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11525 (or 11512 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 33.

The square root of 128081382 is about 11317.3045377422. The cubic root of 128081382 is about 504.0752045122.

The spelling of 128081382 in words is "one hundred twenty-eight million, eighty-one thousand, three hundred eighty-two".