2628640128 has 32 divisors (see below), whose sum is σ = 6982326360. Its totient is φ = 876213248.

The previous prime is 2628640117. The next prime is 2628640159. The reversal of 2628640128 is 8210468262.

2628640128 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3422325 + ... + 3423092.

Almost surely, 2^2628640128 is an apocalyptic number.

It is an amenable number.

2628640128 is an abundant number, since it is smaller than the sum of its proper divisors (4353686232).

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

2628640128 is an equidigital number, since it uses as much as digits as its factorization.

2628640128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6845434 (or 6845422 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 39.

The square root of 2628640128 is about 51270.2655347132. The cubic root of 2628640128 is about 1380.0994341291.

The spelling of 2628640128 in words is "two billion, six hundred twenty-eight million, six hundred forty thousand, one hundred twenty-eight".