448288509 has 4 divisors (see below), whose sum is σ = 597718016. Its totient is φ = 298859004.

The previous prime is 448288501. The next prime is 448288513. The reversal of 448288509 is 905882844.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 448288509 - 2³ = 448288501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (448288501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74714749 + ... + 74714754.

It is an arithmetic number, because the mean of its divisors is an integer number (149429504).

Almost surely, 2^448288509 is an apocalyptic number.

It is an amenable number.

448288509 is a deficient number, since it is larger than the sum of its proper divisors (149429507).

448288509 is a wasteful number, since it uses less digits than its factorization.

448288509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149429506.

The product of its (nonzero) digits is 737280, while the sum is 48.

The square root of 448288509 is about 21172.8247761134. The cubic root of 448288509 is about 765.3366931780.

The spelling of 448288509 in words is "four hundred forty-eight million, two hundred eighty-eight thousand, five hundred nine".