449989818 has 16 divisors (see below), whose sum is σ = 903947040. Its totient is φ = 149335376.

The previous prime is 449989763. The next prime is 449989849. The reversal of 449989818 is 818989944.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163833 + ... + 166556.

It is an arithmetic number, because the mean of its divisors is an integer number (56496690).

Almost surely, 2^449989818 is an apocalyptic number.

449989818 is an abundant number, since it is smaller than the sum of its proper divisors (453957222).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

449989818 is a wasteful number, since it uses less digits than its factorization.

449989818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330621.

The product of its digits is 5971968, while the sum is 60.

The square root of 449989818 is about 21212.9634421973. The cubic root of 449989818 is about 766.3036526739.

The spelling of 449989818 in words is "four hundred forty-nine million, nine hundred eighty-nine thousand, eight hundred eighteen".