448721815 has 4 divisors (see below), whose sum is σ = 538466184. Its totient is φ = 358977448.

The previous prime is 448721809. The next prime is 448721837. The reversal of 448721815 is 518127844.

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

It is a cyclic number.

It is not a de Polignac number, because 448721815 - 2²⁷ = 314504087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44872177 + ... + 44872186.

It is an arithmetic number, because the mean of its divisors is an integer number (134616546).

Almost surely, 2^448721815 is an apocalyptic number.

448721815 is a deficient number, since it is larger than the sum of its proper divisors (89744369).

448721815 is an equidigital number, since it uses as much as digits as its factorization.

448721815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89744368.

The product of its digits is 71680, while the sum is 40.

The square root of 448721815 is about 21183.0549024450. The cubic root of 448721815 is about 765.5831997504.

The spelling of 448721815 in words is "four hundred forty-eight million, seven hundred twenty-one thousand, eight hundred fifteen".