2238856649 has 2 divisors, whose sum is σ = 2238856650. Its totient is φ = 2238856648.

The previous prime is 2238856601. The next prime is 2238856661. The reversal of 2238856649 is 9466588322.

2238856649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2027881024 + 210975625 = 45032^2 + 14525^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2238856649 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2238856649.

It is not a weakly prime, because it can be changed into another prime (2238856699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1119428324 + 1119428325.

It is an arithmetic number, because the mean of its divisors is an integer number (1119428325).

Almost surely, 2^2238856649 is an apocalyptic number.

It is an amenable number.

2238856649 is a deficient number, since it is larger than the sum of its proper divisors (1).

2238856649 is an equidigital number, since it uses as much as digits as its factorization.

2238856649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4976640, while the sum is 53.

The square root of 2238856649 is about 47316.5578735394. The cubic root of 2238856649 is about 1308.2038685134.

The spelling of 2238856649 in words is "two billion, two hundred thirty-eight million, eight hundred fifty-six thousand, six hundred forty-nine".