4448489809 has 3 divisors (see below), whose sum is σ = 4448556507. Its totient is φ = 4448423112.

The previous prime is 4448489803. The next prime is 4448489821. The reversal of 4448489809 is 9089848444.

The square root of 4448489809 is 66697.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 22515025 + 4425974784 = 4745^2 + 66528^2 .

It is a de Polignac number, because none of the positive numbers 2^k-4448489809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4448489803) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 33349 + ... + 100045.

It is an arithmetic number, because the mean of its divisors is an integer number (1482852169).

Almost surely, 2^4448489809 is an apocalyptic number.

4448489809 is the 66697-th square number.

4448489809 is the 33349-th centered octagonal number.

It is an amenable number.

4448489809 is a deficient number, since it is larger than the sum of its proper divisors (66698).

4448489809 is an frugal number, since it uses more digits than its factorization.

4448489809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133394 (or 66697 counting only the distinct ones).

The product of its (nonzero) digits is 10616832, while the sum is 58.

The cubic root of 4448489809 is about 1644.6400679609.

The spelling of 4448489809 in words is "four billion, four hundred forty-eight million, four hundred eighty-nine thousand, eight hundred nine".