2127661728 has 24 divisors (see below), whose sum is σ = 5585112288. Its totient is φ = 709220544.

The previous prime is 2127661699. The next prime is 2127661747. The reversal of 2127661728 is 8271667212.

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 2127661728.

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, 11081476 + ... + 11081667.

It is an arithmetic number, because the mean of its divisors is an integer number (232713012).

Almost surely, 2^2127661728 is an apocalyptic number.

It is an amenable number.

2127661728 is an abundant number, since it is smaller than the sum of its proper divisors (3457450560).

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

2127661728 is a wasteful number, since it uses less digits than its factorization.

2127661728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22163156 (or 22163148 counting only the distinct ones).

The product of its digits is 112896, while the sum is 42.

The square root of 2127661728 is about 46126.5837451680. The cubic root of 2127661728 is about 1286.1773597701.

The spelling of 2127661728 in words is "two billion, one hundred twenty-seven million, six hundred sixty-one thousand, seven hundred twenty-eight".