128857608 has 128 divisors (see below), whose sum is σ = 393897600. Its totient is φ = 38707200.

The previous prime is 128857571. The next prime is 128857633. The reversal of 128857608 is 806758821.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 458428 + ... + 458708.

It is an arithmetic number, because the mean of its divisors is an integer number (3077325).

Almost surely, 2^128857608 is an apocalyptic number.

128857608 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 128857608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196948800).

128857608 is an abundant number, since it is smaller than the sum of its proper divisors (265039992).

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

128857608 is a wasteful number, since it uses less digits than its factorization.

128857608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500 (or 490 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 45.

The square root of 128857608 is about 11351.5465025696. The cubic root of 128857608 is about 505.0914555143.

The spelling of 128857608 in words is "one hundred twenty-eight million, eight hundred fifty-seven thousand, six hundred eight".