2686873878 has 48 divisors (see below), whose sum is σ = 6306562080. Its totient is φ = 826718256.

The previous prime is 2686873837. The next prime is 2686873901. The reversal of 2686873878 is 8783786862.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5575 + ... + 73517.

It is an arithmetic number, because the mean of its divisors is an integer number (131386710).

Almost surely, 2^2686873878 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2686873878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3153281040).

2686873878 is an abundant number, since it is smaller than the sum of its proper divisors (3619688202).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2686873878 is a wasteful number, since it uses less digits than its factorization.

2686873878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67990 (or 67961 counting only the distinct ones).

The product of its digits is 43352064, while the sum is 63.

The square root of 2686873878 is about 51835.0641747457. The cubic root of 2686873878 is about 1390.2164626745.

The spelling of 2686873878 in words is "two billion, six hundred eighty-six million, eight hundred seventy-three thousand, eight hundred seventy-eight".