448785821 has 16 divisors (see below), whose sum is σ = 520525440. Its totient is φ = 382873920.

The previous prime is 448785773. The next prime is 448785851. The reversal of 448785821 is 128587844.

It is not a de Polignac number, because 448785821 - 2¹⁰ = 448784797 is a prime.

It is a pancake number, because a pancake can be divided into 448785821 parts by 29959 straight cuts.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (448785851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3326 + ... + 30143.

It is an arithmetic number, because the mean of its divisors is an integer number (32532840).

Almost surely, 2^448785821 is an apocalyptic number.

It is an amenable number.

448785821 is a deficient number, since it is larger than the sum of its proper divisors (71739619).

448785821 is a wasteful number, since it uses less digits than its factorization.

448785821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33556.

The product of its digits is 573440, while the sum is 47.

The square root of 448785821 is about 21184.5656316102. The cubic root of 448785821 is about 765.6195991311.

The spelling of 448785821 in words is "four hundred forty-eight million, seven hundred eighty-five thousand, eight hundred twenty-one".