128678 has 8 divisors (see below), whose sum is σ = 210600. Its totient is φ = 58480.

The previous prime is 128677. The next prime is 128683. The reversal of 128678 is 876821.

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

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128677) by changing a digit.

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, 2903 + ... + 2946.

It is an arithmetic number, because the mean of its divisors is an integer number (26325).

2¹²⁸⁶⁷⁸ is an apocalyptic number.

128678 is a deficient number, since it is larger than the sum of its proper divisors (81922).

128678 is a wasteful number, since it uses less digits than its factorization.

128678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5862.

The product of its digits is 5376, while the sum is 32.

The square root of 128678 is about 358.7171587755. The cubic root of 128678 is about 50.4856672719.

The spelling of 128678 in words is "one hundred twenty-eight thousand, six hundred seventy-eight".