128489718 has 32 divisors (see below), whose sum is σ = 295006464. Its totient is φ = 36546912.

The previous prime is 128489687. The next prime is 128489731. The reversal of 128489718 is 817984821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2796 + ... + 16272.

It is an arithmetic number, because the mean of its divisors is an integer number (9218952).

Almost surely, 2^128489718 is an apocalyptic number.

128489718 is an abundant number, since it is smaller than the sum of its proper divisors (166516746).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128489718 is a wasteful number, since it uses less digits than its factorization.

128489718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13716.

The product of its digits is 258048, while the sum is 48.

The square root of 128489718 is about 11335.3305201039. The cubic root of 128489718 is about 504.6103166378.

The spelling of 128489718 in words is "one hundred twenty-eight million, four hundred eighty-nine thousand, seven hundred eighteen".