128818742 has 16 divisors (see below), whose sum is σ = 208480272. Its totient is φ = 59343840.

The previous prime is 128818717. The next prime is 128818751. The reversal of 128818742 is 247818821.

It is a self number, because there is not a number n which added to its sum of digits gives 128818742.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10508 + ... + 19184.

It is an arithmetic number, because the mean of its divisors is an integer number (13030017).

Almost surely, 2^128818742 is an apocalyptic number.

128818742 is a deficient number, since it is larger than the sum of its proper divisors (79661530).

128818742 is a wasteful number, since it uses less digits than its factorization.

128818742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9263.

The product of its digits is 57344, while the sum is 41.

The square root of 128818742 is about 11349.8344481318. The cubic root of 128818742 is about 505.0406685544.

The spelling of 128818742 in words is "one hundred twenty-eight million, eight hundred eighteen thousand, seven hundred forty-two".