2838638649 has 96 divisors (see below), whose sum is σ = 5030387712. Its totient is φ = 1406496000.

The previous prime is 2838638623. The next prime is 2838638701. The reversal of 2838638649 is 9468368382.

It is a happy number.

It is not a de Polignac number, because 2838638649 - 2⁵ = 2838638617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2838638549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3115504 + ... + 3116414.

It is an arithmetic number, because the mean of its divisors is an integer number (52399872).

Almost surely, 2^2838638649 is an apocalyptic number.

It is an amenable number.

2838638649 is a deficient number, since it is larger than the sum of its proper divisors (2191749063).

2838638649 is a wasteful number, since it uses less digits than its factorization.

2838638649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1027 (or 1020 counting only the distinct ones).

The product of its digits is 11943936, while the sum is 57.

The square root of 2838638649 is about 53278.8761987338. The cubic root of 2838638649 is about 1415.9134390214.

The spelling of 2838638649 in words is "two billion, eight hundred thirty-eight million, six hundred thirty-eight thousand, six hundred forty-nine".