128383 has 8 divisors (see below), whose sum is σ = 140400. Its totient is φ = 116928.

The previous prime is 128377. The next prime is 128389. The reversal of 128383 is 383821.

It is an interprime number because it is at equal distance from previous prime (128377) and next prime (128389).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 128383 - 2⁵ = 128351 is a prime.

It is a Duffinian 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 7 ways as a sum of consecutive naturals, for example, 435 + ... + 667.

It is an arithmetic number, because the mean of its divisors is an integer number (17550).

2¹²⁸³⁸³ is an apocalyptic number.

128383 is a deficient number, since it is larger than the sum of its proper divisors (12017).

128383 is a wasteful number, since it uses less digits than its factorization.

128383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281.

The product of its digits is 1152, while the sum is 25.

The square root of 128383 is about 358.3057353713. The cubic root of 128383 is about 50.4470575445.

The spelling of 128383 in words is "one hundred twenty-eight thousand, three hundred eighty-three".