448309289 has 4 divisors (see below), whose sum is σ = 463768260. Its totient is φ = 432850320.

The previous prime is 448309247. The next prime is 448309291. The reversal of 448309289 is 982903844.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 292683664 + 155625625 = 17108^2 + 12475^2 .

It is a cyclic number.

It is not a de Polignac number, because 448309289 - 2²⁰ = 447260713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (448309229) 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 in 3 ways as a sum of consecutive naturals, for example, 7729442 + ... + 7729499.

It is an arithmetic number, because the mean of its divisors is an integer number (115942065).

Almost surely, 2^448309289 is an apocalyptic number.

It is an amenable number.

448309289 is a deficient number, since it is larger than the sum of its proper divisors (15458971).

448309289 is a wasteful number, since it uses less digits than its factorization.

448309289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15458970.

The product of its (nonzero) digits is 497664, while the sum is 47.

The square root of 448309289 is about 21173.3154938002. The cubic root of 448309289 is about 765.3485184873.

The spelling of 448309289 in words is "four hundred forty-eight million, three hundred nine thousand, two hundred eighty-nine".