448001721 has 24 divisors (see below), whose sum is σ = 655144776. Its totient is φ = 294981120.

The previous prime is 448001707. The next prime is 448001747. The reversal of 448001721 is 127100844.

It can be written as a sum of positive squares in 4 ways, for example, as 48441600 + 399560121 = 6960^2 + 19989^2 .

It is not a de Polignac number, because 448001721 - 2⁵ = 448001689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (448002721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 378751 + ... + 379931.

It is an arithmetic number, because the mean of its divisors is an integer number (27297699).

Almost surely, 2^448001721 is an apocalyptic number.

It is an amenable number.

448001721 is a deficient number, since it is larger than the sum of its proper divisors (207143055).

448001721 is a wasteful number, since it uses less digits than its factorization.

448001721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1673 (or 1670 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 448001721 is about 21166.0511432813. The cubic root of 448001721 is about 765.1734529156.

The spelling of 448001721 in words is "four hundred forty-eight million, one thousand, seven hundred twenty-one".