2689249538 has 16 divisors (see below), whose sum is σ = 4105150200. Its totient is φ = 1320921600.

The previous prime is 2689249517. The next prime is 2689249579. The reversal of 2689249538 is 8359429862.

It can be written as a sum of positive squares in 4 ways, for example, as 961434049 + 1727815489 = 31007^2 + 41567^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86738 + ... + 113586.

Almost surely, 2^2689249538 is an apocalyptic number.

2689249538 is a deficient number, since it is larger than the sum of its proper divisors (1415900662).

2689249538 is a wasteful number, since it uses less digits than its factorization.

2689249538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27733.

The product of its digits is 7464960, while the sum is 56.

The square root of 2689249538 is about 51857.9746808531. The cubic root of 2689249538 is about 1390.6260723658.

The spelling of 2689249538 in words is "two billion, six hundred eighty-nine million, two hundred forty-nine thousand, five hundred thirty-eight".