128330384 has 80 divisors (see below), whose sum is σ = 311980032. Its totient is φ = 49780224.

The previous prime is 128330381. The next prime is 128330407. The reversal of 128330384 is 483033821.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 128330384.

It is not an unprimeable number, because it can be changed into a prime (128330381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76337 + ... + 77999.

Almost surely, 2^128330384 is an apocalyptic number.

128330384 is a gapful number since it is divisible by the number (14) 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 128330384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155990016).

128330384 is an abundant number, since it is smaller than the sum of its proper divisors (183649648).

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

128330384 is a wasteful number, since it uses less digits than its factorization.

128330384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1744 (or 1738 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 128330384 is about 11328.3001372668. The cubic root of 128330384 is about 504.4016492611.

The spelling of 128330384 in words is "one hundred twenty-eight million, three hundred thirty thousand, three hundred eighty-four".