128272678 has 4 divisors (see below), whose sum is σ = 192409020. Its totient is φ = 64136338.

The previous prime is 128272663. The next prime is 128272681. The reversal of 128272678 is 876272821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 876272821 = 4451 ⋅196871.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32068168 + ... + 32068171.

It is an arithmetic number, because the mean of its divisors is an integer number (48102255).

Almost surely, 2^128272678 is an apocalyptic number.

128272678 is a deficient number, since it is larger than the sum of its proper divisors (64136342).

128272678 is an equidigital number, since it uses as much as digits as its factorization.

128272678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64136341.

The product of its digits is 150528, while the sum is 43.

The square root of 128272678 is about 11325.7528668076. The cubic root of 128272678 is about 504.3260335870.

The spelling of 128272678 in words is "one hundred twenty-eight million, two hundred seventy-two thousand, six hundred seventy-eight".