2689438648 has 16 divisors (see below), whose sum is σ = 5430597480. Its totient is φ = 1241279328.

The previous prime is 2689438621. The next prime is 2689438679. The reversal of 2689438648 is 8468349862.

It is a junction number, because it is equal to n+sod(n) for n = 2689438592 and 2689438601.

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, 12929890 + ... + 12930097.

Almost surely, 2^2689438648 is an apocalyptic number.

It is an amenable number.

2689438648 is an abundant number, since it is smaller than the sum of its proper divisors (2741158832).

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

2689438648 is a wasteful number, since it uses less digits than its factorization.

2689438648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25860006 (or 25860002 counting only the distinct ones).

The product of its digits is 15925248, while the sum is 58.

The square root of 2689438648 is about 51859.7979942074. The cubic root of 2689438648 is about 1390.6586682169.

The spelling of 2689438648 in words is "two billion, six hundred eighty-nine million, four hundred thirty-eight thousand, six hundred forty-eight".