128445000 has 80 divisors (see below), whose sum is σ = 401309040. Its totient is φ = 34248000.

The previous prime is 128444989. The next prime is 128445001. The reversal of 128445000 is 544821.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (128445001) 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, 10719 + ... + 19281.

It is an arithmetic number, because the mean of its divisors is an integer number (5016363).

Almost surely, 2^128445000 is an apocalyptic number.

128445000 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 128445000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (200654520).

128445000 is an abundant number, since it is smaller than the sum of its proper divisors (272864040).

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

128445000 is an equidigital number, since it uses as much as digits as its factorization.

128445000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8592 (or 8573 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 128445000 is about 11333.3578431108. The cubic root of 128445000 is about 504.5517703646.

Adding to 128445000 its reverse (544821), we get a palindrome (128989821).

The spelling of 128445000 in words is "one hundred twenty-eight million, four hundred forty-five thousand".