128278 has 8 divisors (see below), whose sum is σ = 198720. Its totient is φ = 62040.

The previous prime is 128273. The next prime is 128287. The reversal of 128278 is 872821.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128273) 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, 973 + ... + 1096.

It is an arithmetic number, because the mean of its divisors is an integer number (24840).

2¹²⁸²⁷⁸ is an apocalyptic number.

128278 is a deficient number, since it is larger than the sum of its proper divisors (70442).

128278 is a wasteful number, since it uses less digits than its factorization.

128278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2102.

The product of its digits is 1792, while the sum is 28.

The square root of 128278 is about 358.1591824873. The cubic root of 128278 is about 50.4333008276.

It can be divided in two parts, 128 and 278, that added together give a triangular number (406 = T₂₈).

The spelling of 128278 in words is "one hundred twenty-eight thousand, two hundred seventy-eight".