128078671 has 8 divisors (see below), whose sum is σ = 148229120. Its totient is φ = 108391608.

The previous prime is 128078609. The next prime is 128078683. The reversal of 128078671 is 176870821.

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

It is a cyclic number.

It is not a de Polignac number, because 128078671 - 2²¹ = 125981519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128078771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115251 + ... + 116356.

It is an arithmetic number, because the mean of its divisors is an integer number (18528640).

Almost surely, 2^128078671 is an apocalyptic number.

128078671 is a deficient number, since it is larger than the sum of its proper divisors (20150449).

128078671 is an equidigital number, since it uses as much as digits as its factorization.

128078671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231693.

The product of its (nonzero) digits is 37632, while the sum is 40.

The square root of 128078671 is about 11317.1847647726. The cubic root of 128078671 is about 504.0716480299.

The spelling of 128078671 in words is "one hundred twenty-eight million, seventy-eight thousand, six hundred seventy-one".