128918 has 8 divisors (see below), whose sum is σ = 196248. Its totient is φ = 63504.

The previous prime is 128903. The next prime is 128923. The reversal of 128918 is 819821.

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

It is a Curzon number.

It is a plaindrome in base 13.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 296 + ... + 587.

It is an arithmetic number, because the mean of its divisors is an integer number (24531).

2¹²⁸⁹¹⁸ is an apocalyptic number.

128918 is a deficient number, since it is larger than the sum of its proper divisors (67330).

128918 is an equidigital number, since it uses as much as digits as its factorization.

128918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 958.

The product of its digits is 1152, while the sum is 29.

The square root of 128918 is about 359.0515283354. The cubic root of 128918 is about 50.5170350659.

The spelling of 128918 in words is "one hundred twenty-eight thousand, nine hundred eighteen".