2128316538 has 8 divisors (see below), whose sum is σ = 4256633088. Its totient is φ = 709438844.

The previous prime is 2128316537. The next prime is 2128316539. The reversal of 2128316538 is 8356138212.

It is an interprime number because it is at equal distance from previous prime (2128316537) and next prime (2128316539).

It is a sphenic number, since it is the product of 3 distinct primes.

2128316538 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 2128316496 and 2128316505.

It is not an unprimeable number, because it can be changed into a prime (2128316537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 177359706 + ... + 177359717.

It is an arithmetic number, because the mean of its divisors is an integer number (532079136).

Almost surely, 2^2128316538 is an apocalyptic number.

2128316538 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2128316538 is a wasteful number, since it uses less digits than its factorization.

2128316538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354719428.

The product of its digits is 69120, while the sum is 39.

The square root of 2128316538 is about 46133.6811668005. The cubic root of 2128316538 is about 1286.3092910513.

The spelling of 2128316538 in words is "two billion, one hundred twenty-eight million, three hundred sixteen thousand, five hundred thirty-eight".