128718 has 12 divisors (see below), whose sum is σ = 278928. Its totient is φ = 42900.

The previous prime is 128717. The next prime is 128747. The reversal of 128718 is 817821.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 128691 and 128700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128717) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3558 + ... + 3593.

It is an arithmetic number, because the mean of its divisors is an integer number (23244).

2¹²⁸⁷¹⁸ is an apocalyptic number.

128718 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

128718 is an abundant number, since it is smaller than the sum of its proper divisors (150210).

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

128718 is a wasteful number, since it uses less digits than its factorization.

128718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7159 (or 7156 counting only the distinct ones).

The product of its digits is 896, while the sum is 27.

The square root of 128718 is about 358.7729086762. The cubic root of 128718 is about 50.4908979446.

The spelling of 128718 in words is "one hundred twenty-eight thousand, seven hundred eighteen".