128488879 has 8 divisors (see below), whose sum is σ = 138699360. Its totient is φ = 118663776.

The previous prime is 128488847. The next prime is 128488889. The reversal of 128488879 is 978884821.

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 128488879 - 2⁵ = 128488847 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 (128488889) 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, 95652 + ... + 96985.

It is an arithmetic number, because the mean of its divisors is an integer number (17337420).

Almost surely, 2^128488879 is an apocalyptic number.

128488879 is a deficient number, since it is larger than the sum of its proper divisors (10210481).

128488879 is a wasteful number, since it uses less digits than its factorization.

128488879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192689.

The product of its digits is 2064384, while the sum is 55.

The square root of 128488879 is about 11335.2935118593. The cubic root of 128488879 is about 504.6092183166.

The spelling of 128488879 in words is "one hundred twenty-eight million, four hundred eighty-eight thousand, eight hundred seventy-nine".