128851968 has 168 divisors, whose sum is σ = 403414992. Its totient is φ = 36470784.

The previous prime is 128851967. The next prime is 128851969. The reversal of 128851968 is 869158821.

It is an interprime number because it is at equal distance from previous prime (128851967) and next prime (128851969).

It is a tau number, because it is divible by the number of its divisors (168).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (128851963) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1204171 + ... + 1204277.

Almost surely, 2^128851968 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128851968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (201707496).

128851968 is an abundant number, since it is smaller than the sum of its proper divisors (274563024).

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

128851968 is an equidigital number, since it uses as much as digits as its factorization.

128851968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150 (or 119 counting only the distinct ones).

The product of its digits is 276480, while the sum is 48.

The square root of 128851968 is about 11351.2980755507. The cubic root of 128851968 is about 505.0840862498.

The spelling of 128851968 in words is "one hundred twenty-eight million, eight hundred fifty-one thousand, nine hundred sixty-eight".