128380 has 36 divisors (see below), whose sum is σ = 316008. Its totient is φ = 43680.

The previous prime is 128377. The next prime is 128389. The reversal of 128380 is 83821.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128389) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 915 + ... + 1045.

It is an arithmetic number, because the mean of its divisors is an integer number (8778).

2¹²⁸³⁸⁰ is an apocalyptic number.

128380 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 128380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158004).

128380 is an abundant number, since it is smaller than the sum of its proper divisors (187628).

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

128380 is a wasteful number, since it uses less digits than its factorization.

128380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154 (or 145 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 128380 is about 358.3015489780. The cubic root of 128380 is about 50.4466645995.

The spelling of 128380 in words is "one hundred twenty-eight thousand, three hundred eighty".