128927500 has 60 divisors (see below), whose sum is σ = 303702784. Its totient is φ = 47592000.

The previous prime is 128927441. The next prime is 128927501. The reversal of 128927500 is 5729821.

It is not an unprimeable number, because it can be changed into a prime (128927501) 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, 30517 + ... + 34483.

Almost surely, 2^128927500 is an apocalyptic number.

128927500 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 128927500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151851392).

128927500 is an abundant number, since it is smaller than the sum of its proper divisors (174775284).

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

128927500 is a wasteful number, since it uses less digits than its factorization.

128927500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4004 (or 3987 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 128927500 is about 11354.6246085020. The cubic root of 128927500 is about 505.1827590649.

The spelling of 128927500 in words is "one hundred twenty-eight million, nine hundred twenty-seven thousand, five hundred".