2138888888 has 16 divisors (see below), whose sum is σ = 4030777080. Its totient is φ = 1064015008.

The previous prime is 2138888867. The next prime is 2138888911. The reversal of 2138888888 is 8888888312.

It is a self number, because there is not a number n which added to its sum of digits gives 2138888888.

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, 677006 + ... + 680157.

Almost surely, 2^2138888888 is an apocalyptic number.

It is an amenable number.

2138888888 is a deficient number, since it is larger than the sum of its proper divisors (1891888192).

2138888888 is a wasteful number, since it uses less digits than its factorization.

2138888888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1357366 (or 1357362 counting only the distinct ones).

The product of its digits is 12582912, while the sum is 62.

The square root of 2138888888 is about 46248.1230754287. The cubic root of 2138888888 is about 1288.4356752408.

The spelling of 2138888888 in words is "two billion, one hundred thirty-eight million, eight hundred eighty-eight thousand, eight hundred eighty-eight".