2138923988 has 12 divisors (see below), whose sum is σ = 3863862912. Its totient is φ = 1034963160.

The previous prime is 2138923961. The next prime is 2138924023. The reversal of 2138923988 is 8893298312.

It is a congruent number.

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, 8624570 + ... + 8624817.

It is an arithmetic number, because the mean of its divisors is an integer number (321988576).

Almost surely, 2^2138923988 is an apocalyptic number.

It is an amenable number.

2138923988 is a deficient number, since it is larger than the sum of its proper divisors (1724938924).

2138923988 is a wasteful number, since it uses less digits than its factorization.

2138923988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17249422 (or 17249420 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 53.

The square root of 2138923988 is about 46248.5025487312. The cubic root of 2138923988 is about 1288.4427231128.

The spelling of 2138923988 in words is "two billion, one hundred thirty-eight million, nine hundred twenty-three thousand, nine hundred eighty-eight".