2788248649 has 2 divisors, whose sum is σ = 2788248650. Its totient is φ = 2788248648.

The previous prime is 2788248647. The next prime is 2788248653. The reversal of 2788248649 is 9468428872.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2776552249 + 11696400 = 52693^2 + 3420^2 .

It is a cyclic number.

It is not a de Polignac number, because 2788248649 - 2¹ = 2788248647 is a prime.

Together with 2788248647, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 2788248593 and 2788248602.

It is not a weakly prime, because it can be changed into another prime (2788248647) 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 as a sum of consecutive naturals, namely, 1394124324 + 1394124325.

It is an arithmetic number, because the mean of its divisors is an integer number (1394124325).

Almost surely, 2^2788248649 is an apocalyptic number.

It is an amenable number.

2788248649 is a deficient number, since it is larger than the sum of its proper divisors (1).

2788248649 is an equidigital number, since it uses as much as digits as its factorization.

2788248649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12386304, while the sum is 58.

The square root of 2788248649 is about 52803.8696403966. The cubic root of 2788248649 is about 1407.4851890793.

The spelling of 2788248649 in words is "two billion, seven hundred eighty-eight million, two hundred forty-eight thousand, six hundred forty-nine".