448420909 has 4 divisors (see below), whose sum is σ = 449835804. Its totient is φ = 447006016.

The previous prime is 448420901. The next prime is 448420927. The reversal of 448420909 is 909024844.

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

It can be written as a sum of positive squares in 2 ways, for example, as 93663684 + 354757225 = 9678^2 + 18835^2 .

It is a cyclic number.

It is not a de Polignac number, because 448420909 - 2³ = 448420901 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (448420901) 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, 706972 + ... + 707605.

It is an arithmetic number, because the mean of its divisors is an integer number (112458951).

Almost surely, 2^448420909 is an apocalyptic number.

It is an amenable number.

448420909 is a deficient number, since it is larger than the sum of its proper divisors (1414895).

448420909 is a wasteful number, since it uses less digits than its factorization.

448420909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1414894.

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 448420909 is about 21175.9511946925. The cubic root of 448420909 is about 765.4120320145.

The spelling of 448420909 in words is "four hundred forty-eight million, four hundred twenty thousand, nine hundred nine".