2139873886 has 16 divisors (see below), whose sum is σ = 3293540208. Its totient is φ = 1042113600.

The previous prime is 2139873877. The next prime is 2139873889. The reversal of 2139873886 is 6883789312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2139873889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28981 + ... + 71551.

It is an arithmetic number, because the mean of its divisors is an integer number (205846263).

Almost surely, 2^2139873886 is an apocalyptic number.

2139873886 is a deficient number, since it is larger than the sum of its proper divisors (1153666322).

2139873886 is a wasteful number, since it uses less digits than its factorization.

2139873886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43227.

The product of its digits is 3483648, while the sum is 55.

The square root of 2139873886 is about 46258.7709088774. The cubic root of 2139873886 is about 1288.6334277288.

The spelling of 2139873886 in words is "two billion, one hundred thirty-nine million, eight hundred seventy-three thousand, eight hundred eighty-six".