448644989 has 16 divisors (see below), whose sum is σ = 500666880. Its totient is φ = 399228480.

The previous prime is 448644941. The next prime is 448644991. The reversal of 448644989 is 989446844.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-448644989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (448644289) 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, 109622 + ... + 113640.

It is an arithmetic number, because the mean of its divisors is an integer number (31291680).

Almost surely, 2^448644989 is an apocalyptic number.

It is an amenable number.

448644989 is a deficient number, since it is larger than the sum of its proper divisors (52021891).

448644989 is a wasteful number, since it uses less digits than its factorization.

448644989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4340.

The product of its digits is 7962624, while the sum is 56.

The square root of 448644989 is about 21181.2414414264. The cubic root of 448644989 is about 765.5395052312.

The spelling of 448644989 in words is "four hundred forty-eight million, six hundred forty-four thousand, nine hundred eighty-nine".