128752500 has 60 divisors (see below), whose sum is σ = 375429824. Its totient is φ = 34332000.

The previous prime is 128752499. The next prime is 128752501. The reversal of 128752500 is 5257821.

It is an interprime number because it is at equal distance from previous prime (128752499) and next prime (128752501).

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128752501) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1084 + ... + 16083.

Almost surely, 2^128752500 is an apocalyptic number.

128752500 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 128752500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187714912).

128752500 is an abundant number, since it is smaller than the sum of its proper divisors (246677324).

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

128752500 is a wasteful number, since it uses less digits than its factorization.

128752500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17194 (or 17177 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 30.

The square root of 128752500 is about 11346.9158805378. The cubic root of 128752500 is about 504.9540852939.

The spelling of 128752500 in words is "one hundred twenty-eight million, seven hundred fifty-two thousand, five hundred".