128858 has 8 divisors (see below), whose sum is σ = 203520. Its totient is φ = 61020.

The previous prime is 128857. The next prime is 128861. The reversal of 128858 is 858821.

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

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 128858.

It is not an unprimeable number, because it can be changed into a prime (128857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1658 + ... + 1733.

It is an arithmetic number, because the mean of its divisors is an integer number (25440).

2¹²⁸⁸⁵⁸ is an apocalyptic number.

128858 is a deficient number, since it is larger than the sum of its proper divisors (74662).

128858 is a wasteful number, since it uses less digits than its factorization.

128858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3412.

The product of its digits is 5120, while the sum is 32.

The square root of 128858 is about 358.9679651445. The cubic root of 128858 is about 50.5091967696.

The spelling of 128858 in words is "one hundred twenty-eight thousand, eight hundred fifty-eight".