128689882 has 8 divisors (see below), whose sum is σ = 193127616. Its totient is φ = 64314012.

The previous prime is 128689877. The next prime is 128689889. The reversal of 128689882 is 288986821.

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

It is a super-2 number, since 2×128689882² = 33122171458347848, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128689889) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 9858 + ... + 18829.

It is an arithmetic number, because the mean of its divisors is an integer number (24140952).

Almost surely, 2^128689882 is an apocalyptic number.

128689882 is a deficient number, since it is larger than the sum of its proper divisors (64437734).

128689882 is a wasteful number, since it uses less digits than its factorization.

128689882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30932.

The product of its digits is 884736, while the sum is 52.

The square root of 128689882 is about 11344.1562929995. The cubic root of 128689882 is about 504.8722115640.

The spelling of 128689882 in words is "one hundred twenty-eight million, six hundred eighty-nine thousand, eight hundred eighty-two".