128443020 has 96 divisors (see below), whose sum is σ = 370137600. Its totient is φ = 33268224.

The previous prime is 128442997. The next prime is 128443039. The reversal of 128443020 is 20344821.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 357601 + ... + 357959.

It is an arithmetic number, because the mean of its divisors is an integer number (3855600).

Almost surely, 2^128443020 is an apocalyptic number.

128443020 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 128443020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185068800).

128443020 is an abundant number, since it is smaller than the sum of its proper divisors (241694580).

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

128443020 is a wasteful number, since it uses less digits than its factorization.

128443020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527 (or 525 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 128443020 is about 11333.2704900218. The cubic root of 128443020 is about 504.5491777695.

Adding to 128443020 its reverse (20344821), we get a palindrome (148787841).

The spelling of 128443020 in words is "one hundred twenty-eight million, four hundred forty-three thousand, twenty".