2788188449 has 2 divisors, whose sum is σ = 2788188450. Its totient is φ = 2788188448.

The previous prime is 2788188439. The next prime is 2788188511. The reversal of 2788188449 is 9448818872.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2208342049 + 579846400 = 46993^2 + 24080^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2788188449 is a prime.

It is not a weakly prime, because it can be changed into another prime (2788188419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1394094224 + 1394094225.

It is an arithmetic number, because the mean of its divisors is an integer number (1394094225).

Almost surely, 2^2788188449 is an apocalyptic number.

It is an amenable number.

2788188449 is a deficient number, since it is larger than the sum of its proper divisors (1).

2788188449 is an equidigital number, since it uses as much as digits as its factorization.

2788188449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8257536, while the sum is 59.

The square root of 2788188449 is about 52803.2996033392. The cubic root of 2788188449 is about 1407.4750595166.

The spelling of 2788188449 in words is "two billion, seven hundred eighty-eight million, one hundred eighty-eight thousand, four hundred forty-nine".