128578871 has 8 divisors (see below), whose sum is σ = 143308080. Its totient is φ = 114645888.

The previous prime is 128578867. The next prime is 128578883. The reversal of 128578871 is 178875821.

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 128578871 - 2² = 128578867 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 (128578841) 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, 198716 + ... + 199361.

It is an arithmetic number, because the mean of its divisors is an integer number (17913510).

Almost surely, 2^128578871 is an apocalyptic number.

128578871 is a deficient number, since it is larger than the sum of its proper divisors (14729209).

128578871 is a wasteful number, since it uses less digits than its factorization.

128578871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398113.

The product of its digits is 250880, while the sum is 47.

The square root of 128578871 is about 11339.2623657802. The cubic root of 128578871 is about 504.7269981471.

The spelling of 128578871 in words is "one hundred twenty-eight million, five hundred seventy-eight thousand, eight hundred seventy-one".