128487168 has 144 divisors (see below), whose sum is σ = 393674400. Its totient is φ = 41287680.

The previous prime is 128487137. The next prime is 128487169. The reversal of 128487168 is 861784821.

128487168 is a `hidden beast` number, since 1 + 2 + 8 + 487 + 168 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128487169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 200128 + ... + 200768.

It is an arithmetic number, because the mean of its divisors is an integer number (2733850).

Almost surely, 2^128487168 is an apocalyptic number.

128487168 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128487168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196837200).

128487168 is an abundant number, since it is smaller than the sum of its proper divisors (265187232).

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

128487168 is an equidigital number, since it uses as much as digits as its factorization.

128487168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695 (or 675 counting only the distinct ones).

The product of its digits is 172032, while the sum is 45.

The square root of 128487168 is about 11335.2180393674. The cubic root of 128487168 is about 504.6069784594.

The spelling of 128487168 in words is "one hundred twenty-eight million, four hundred eighty-seven thousand, one hundred sixty-eight".