4448889989 has 2 divisors, whose sum is σ = 4448889990. Its totient is φ = 4448889988.

The previous prime is 4448889983. The next prime is 4448890001. The reversal of 4448889989 is 9899888444.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3620428900 + 828461089 = 60170^2 + 28783^2 .

It is a cyclic number.

It is not a de Polignac number, because 4448889989 - 2¹² = 4448885893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4448889983) 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, 2224444994 + 2224444995.

It is an arithmetic number, because the mean of its divisors is an integer number (2224444995).

Almost surely, 2^4448889989 is an apocalyptic number.

It is an amenable number.

4448889989 is a deficient number, since it is larger than the sum of its proper divisors (1).

4448889989 is an equidigital number, since it uses as much as digits as its factorization.

4448889989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 191102976, while the sum is 71.

The square root of 4448889989 is about 66699.9999175412. Note that the first 4 decimals coincide. The cubic root of 4448889989 is about 1644.6893829986.

The spelling of 4448889989 in words is "four billion, four hundred forty-eight million, eight hundred eighty-nine thousand, nine hundred eighty-nine".