448865409 has 4 divisors (see below), whose sum is σ = 598487216. Its totient is φ = 299243604.

The previous prime is 448865387. The next prime is 448865423. The reversal of 448865409 is 904568844.

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 448865409 - 2⁵ = 448865377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (448865429) 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, 74810899 + ... + 74810904.

It is an arithmetic number, because the mean of its divisors is an integer number (149621804).

Almost surely, 2^448865409 is an apocalyptic number.

It is an amenable number.

448865409 is a deficient number, since it is larger than the sum of its proper divisors (149621807).

448865409 is a wasteful number, since it uses less digits than its factorization.

448865409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149621806.

The product of its (nonzero) digits is 1105920, while the sum is 48.

The square root of 448865409 is about 21186.4439913828. The cubic root of 448865409 is about 765.6648549660.

The spelling of 448865409 in words is "four hundred forty-eight million, eight hundred sixty-five thousand, four hundred nine".