449261649 has 24 divisors (see below), whose sum is σ = 677626560. Its totient is φ = 286459488.

The previous prime is 449261647. The next prime is 449261663. The reversal of 449261649 is 946162944.

It is not a de Polignac number, because 449261649 - 2¹ = 449261647 is a prime.

It is not an unprimeable number, because it can be changed into a prime (449261647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19884 + ... + 35970.

It is an arithmetic number, because the mean of its divisors is an integer number (28234440).

Almost surely, 2^449261649 is an apocalyptic number.

It is an amenable number.

449261649 is a deficient number, since it is larger than the sum of its proper divisors (228364911).

449261649 is a wasteful number, since it uses less digits than its factorization.

449261649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16229 (or 16226 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 449261649 is about 21195.7931911028. The cubic root of 449261649 is about 765.8900878957.

The spelling of 449261649 in words is "four hundred forty-nine million, two hundred sixty-one thousand, six hundred forty-nine".