2128952844 has 18 divisors (see below), whose sum is σ = 5381519780. Its totient is φ = 709650936.

The previous prime is 2128952809. The next prime is 2128952849. The reversal of 2128952844 is 4482598212.

2128952844 is a `hidden beast` number, since 2 + 1 + 2 + 89 + 528 + 44 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a self number, because there is not a number n which added to its sum of digits gives 2128952844.

It is not an unprimeable number, because it can be changed into a prime (2128952849) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 29568754 + ... + 29568825.

Almost surely, 2^2128952844 is an apocalyptic number.

It is an amenable number.

2128952844 is an abundant number, since it is smaller than the sum of its proper divisors (3252566936).

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

2128952844 is a wasteful number, since it uses less digits than its factorization.

2128952844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59137589 (or 59137584 counting only the distinct ones).

The product of its digits is 368640, while the sum is 45.

The square root of 2128952844 is about 46140.5769794874. The cubic root of 2128952844 is about 1286.4374682202.

The spelling of 2128952844 in words is "two billion, one hundred twenty-eight million, nine hundred fifty-two thousand, eight hundred forty-four".