128875000 has 56 divisors (see below), whose sum is σ = 302339880. Its totient is φ = 51500000.

The previous prime is 128874989. The next prime is 128875001. The reversal of 128875000 is 578821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128875001) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 124485 + ... + 125515.

Almost surely, 2^128875000 is an apocalyptic number.

128875000 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 128875000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151169940).

128875000 is an abundant number, since it is smaller than the sum of its proper divisors (173464880).

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

128875000 is an frugal number, since it uses more digits than its factorization.

128875000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1067 (or 1038 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 31.

The square root of 128875000 is about 11352.3125397427. The cubic root of 128875000 is about 505.1141786724.

The spelling of 128875000 in words is "one hundred twenty-eight million, eight hundred seventy-five thousand".