128378250 has 512 divisors, whose sum is σ = 503193600. Its totient is φ = 23328000.

The previous prime is 128378213. The next prime is 128378267. The reversal of 128378250 is 52873821.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 6756741 + ... + 6756759.

It is an arithmetic number, because the mean of its divisors is an integer number (982800).

Almost surely, 2^128378250 is an apocalyptic number.

128378250 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 128378250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (251596800).

128378250 is an abundant number, since it is smaller than the sum of its proper divisors (374815350).

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

128378250 is a wasteful number, since it uses less digits than its factorization.

128378250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76 (or 60 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 128378250 is about 11330.4126138460. The cubic root of 128378250 is about 504.4643537884.

The spelling of 128378250 in words is "one hundred twenty-eight million, three hundred seventy-eight thousand, two hundred fifty".