128458 has 8 divisors (see below), whose sum is σ = 210240. Its totient is φ = 58380.

The previous prime is 128449. The next prime is 128461. The reversal of 128458 is 854821.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2898 + ... + 2941.

It is an arithmetic number, because the mean of its divisors is an integer number (26280).

2¹²⁸⁴⁵⁸ is an apocalyptic number.

128458 is a deficient number, since it is larger than the sum of its proper divisors (81782).

128458 is a wasteful number, since it uses less digits than its factorization.

128458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5852.

The product of its digits is 2560, while the sum is 28.

The square root of 128458 is about 358.4103793140. The cubic root of 128458 is about 50.4568791792.

The spelling of 128458 in words is "one hundred twenty-eight thousand, four hundred fifty-eight".