2138986885 has 16 divisors (see below), whose sum is σ = 2983190400. Its totient is φ = 1441872576.

The previous prime is 2138986853. The next prime is 2138986907. The reversal of 2138986885 is 5886898312.

It is a cyclic number.

It is not a de Polignac number, because 2138986885 - 2⁵ = 2138986853 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 515850 + ... + 519979.

It is an arithmetic number, because the mean of its divisors is an integer number (186449400).

Almost surely, 2^2138986885 is an apocalyptic number.

It is an amenable number.

2138986885 is a deficient number, since it is larger than the sum of its proper divisors (844203515).

2138986885 is a wasteful number, since it uses less digits than its factorization.

2138986885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1035900.

The product of its digits is 6635520, while the sum is 58.

The square root of 2138986885 is about 46249.1825333162. The cubic root of 2138986885 is about 1288.4553522646.

The spelling of 2138986885 in words is "two billion, one hundred thirty-eight million, nine hundred eighty-six thousand, eight hundred eighty-five".