2128530432 has 264 divisors, whose sum is σ = 6764729088. Its totient is φ = 582819840.

The previous prime is 2128530379. The next prime is 2128530493. The reversal of 2128530432 is 2340358212.

It is a self number, because there is not a number n which added to its sum of digits gives 2128530432.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20665293 + ... + 20665395.

Almost surely, 2^2128530432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2128530432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3382364544).

2128530432 is an abundant number, since it is smaller than the sum of its proper divisors (4636198656).

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

2128530432 is a wasteful number, since it uses less digits than its factorization.

2128530432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195 (or 146 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 2128530432 is about 46135.9993063985. Note that the first 3 decimals coincide. The cubic root of 2128530432 is about 1286.3523806040.

Adding to 2128530432 its reverse (2340358212), we get a palindrome (4468888644).

The spelling of 2128530432 in words is "two billion, one hundred twenty-eight million, five hundred thirty thousand, four hundred thirty-two".