128351250 has 80 divisors (see below), whose sum is σ = 356510880. Its totient is φ = 34218000.

The previous prime is 128351243. The next prime is 128351257. The reversal of 128351250 is 52153821.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (128351243) and next prime (128351257).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (128351257) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 31849 + ... + 35651.

It is an arithmetic number, because the mean of its divisors is an integer number (4456386).

Almost surely, 2^128351250 is an apocalyptic number.

128351250 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 128351250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (178255440).

128351250 is an abundant number, since it is smaller than the sum of its proper divisors (228159630).

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

128351250 is an equidigital number, since it uses as much as digits as its factorization.

128351250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3834 (or 3813 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 128351250 is about 11329.2210676639. The cubic root of 128351250 is about 504.4289856671.

The spelling of 128351250 in words is "one hundred twenty-eight million, three hundred fifty-one thousand, two hundred fifty".