128857080 has 256 divisors, whose sum is σ = 451215360. Its totient is φ = 29145600.

The previous prime is 128857061. The next prime is 128857081. The reversal of 128857080 is 80758821.

It is a super-2 number, since 2×128857080² = 33208294132252800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128857081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1923207 + ... + 1923273.

It is an arithmetic number, because the mean of its divisors is an integer number (1762560).

Almost surely, 2^128857080 is an apocalyptic number.

128857080 is a gapful number since it is divisible by the number (10) 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 128857080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (225607680).

128857080 is an abundant number, since it is smaller than the sum of its proper divisors (322358280).

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

128857080 is a wasteful number, since it uses less digits than its factorization.

128857080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170 (or 166 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 39.

The square root of 128857080 is about 11351.5232458027. The cubic root of 128857080 is about 505.0907656348.

The spelling of 128857080 in words is "one hundred twenty-eight million, eight hundred fifty-seven thousand, eighty".