128471878 has 8 divisors (see below), whose sum is σ = 192764880. Its totient is φ = 64216920.

The previous prime is 128471867. The next prime is 128471909. The reversal of 128471878 is 878174821.

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

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 in 3 ways as a sum of consecutive naturals, for example, 1468 + ... + 16096.

It is an arithmetic number, because the mean of its divisors is an integer number (24095610).

Almost surely, 2^128471878 is an apocalyptic number.

128471878 is a deficient number, since it is larger than the sum of its proper divisors (64293002).

128471878 is a wasteful number, since it uses less digits than its factorization.

128471878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19022.

The product of its digits is 200704, while the sum is 46.

The square root of 128471878 is about 11334.5435726367. The cubic root of 128471878 is about 504.5869615532.

The spelling of 128471878 in words is "one hundred twenty-eight million, four hundred seventy-one thousand, eight hundred seventy-eight".