2128267828 has 12 divisors (see below), whose sum is σ = 3733318372. Its totient is φ = 1061605440.

The previous prime is 2128267819. The next prime is 2128267829. The reversal of 2128267828 is 8287628212.

It can be written as a sum of positive squares in 2 ways, for example, as 1097729424 + 1030538404 = 33132^2 + 32102^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2128267829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 630225 + ... + 633592.

Almost surely, 2^2128267828 is an apocalyptic number.

It is an amenable number.

2128267828 is a deficient number, since it is larger than the sum of its proper divisors (1605050544).

2128267828 is a wasteful number, since it uses less digits than its factorization.

2128267828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1264242 (or 1264240 counting only the distinct ones).

The product of its digits is 344064, while the sum is 46.

The square root of 2128267828 is about 46133.1532414597. The cubic root of 2128267828 is about 1286.2994778801.

The spelling of 2128267828 in words is "two billion, one hundred twenty-eight million, two hundred sixty-seven thousand, eight hundred twenty-eight".