128719968 has 48 divisors (see below), whose sum is σ = 363884976. Its totient is φ = 39605760.

The previous prime is 128719939. The next prime is 128719973. The reversal of 128719968 is 869917821.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 128719968.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50323 + ... + 52818.

It is an arithmetic number, because the mean of its divisors is an integer number (7580937).

Almost surely, 2^128719968 is an apocalyptic number.

It is an amenable number.

128719968 is an abundant number, since it is smaller than the sum of its proper divisors (235165008).

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

128719968 is a wasteful number, since it uses less digits than its factorization.

128719968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103167 (or 103159 counting only the distinct ones).

The product of its digits is 435456, while the sum is 51.

The square root of 128719968 is about 11345.4822726934. The cubic root of 128719968 is about 504.9115526569.

The spelling of 128719968 in words is "one hundred twenty-eight million, seven hundred nineteen thousand, nine hundred sixty-eight".