2686139188 has 12 divisors (see below), whose sum is σ = 4726715812. Its totient is φ = 1335648960.

The previous prime is 2686139177. The next prime is 2686139189. The reversal of 2686139188 is 8819316862.

It can be written as a sum of positive squares in 2 ways, for example, as 642014244 + 2044124944 = 25338^2 + 45212^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2686139189) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1854345 + ... + 1855792.

Almost surely, 2^2686139188 is an apocalyptic number.

It is an amenable number.

2686139188 is a deficient number, since it is larger than the sum of its proper divisors (2040576624).

2686139188 is a wasteful number, since it uses less digits than its factorization.

2686139188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3710322 (or 3710320 counting only the distinct ones).

The product of its digits is 995328, while the sum is 52.

The square root of 2686139188 is about 51827.9768850763. The cubic root of 2686139188 is about 1390.0897390435.

It can be divided in two parts, 26861 and 39188, that added together give a square (66049 = 257²).

The spelling of 2686139188 in words is "two billion, six hundred eighty-six million, one hundred thirty-nine thousand, one hundred eighty-eight".