2128798836 has 36 divisors (see below), whose sum is σ = 5664349600. Its totient is φ = 672252048.

The previous prime is 2128798823. The next prime is 2128798873. The reversal of 2128798836 is 6388978212.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1555456 + ... + 1556823.

Almost surely, 2^2128798836 is an apocalyptic number.

It is an amenable number.

2128798836 is an abundant number, since it is smaller than the sum of its proper divisors (3535550764).

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

2128798836 is a wasteful number, since it uses less digits than its factorization.

2128798836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3112308 (or 3112303 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The square root of 2128798836 is about 46138.9080494977. The cubic root of 2128798836 is about 1286.4064472671.

The spelling of 2128798836 in words is "two billion, one hundred twenty-eight million, seven hundred ninety-eight thousand, eight hundred thirty-six".