449898813 has 64 divisors (see below), whose sum is σ = 832204800. Its totient is φ = 233876160.

The previous prime is 449898797. The next prime is 449898847. The reversal of 449898813 is 318898944.

It is not a de Polignac number, because 449898813 - 2⁴ = 449898797 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 449898813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (449893813) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 173158 + ... + 175736.

It is an arithmetic number, because the mean of its divisors is an integer number (13003200).

Almost surely, 2^449898813 is an apocalyptic number.

It is an amenable number.

449898813 is a deficient number, since it is larger than the sum of its proper divisors (382305987).

449898813 is a wasteful number, since it uses less digits than its factorization.

449898813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2679 (or 2673 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 54.

The square root of 449898813 is about 21210.8183010463. The cubic root of 449898813 is about 766.2519906416.

The spelling of 449898813 in words is "four hundred forty-nine million, eight hundred ninety-eight thousand, eight hundred thirteen".