128808750 has 120 divisors (see below), whose sum is σ = 375011208. Its totient is φ = 29400000.

The previous prime is 128808737. The next prime is 128808769. The reversal of 128808750 is 57808821.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 128808699 and 128808708.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 183400 + ... + 184100.

Almost surely, 2^128808750 is an apocalyptic number.

128808750 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 128808750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187505604).

128808750 is an abundant number, since it is smaller than the sum of its proper divisors (246202458).

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

128808750 is an equidigital number, since it uses as much as digits as its factorization.

128808750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740 (or 718 counting only the distinct ones).

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

The square root of 128808750 is about 11349.3942569637. The cubic root of 128808750 is about 505.0276101625.

The spelling of 128808750 in words is "one hundred twenty-eight million, eight hundred eight thousand, seven hundred fifty".