449408639 has 4 divisors (see below), whose sum is σ = 451008240. Its totient is φ = 447809040.

The previous prime is 449408627. The next prime is 449408647. The reversal of 449408639 is 936804944.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 449408639 - 2²⁰ = 448360063 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 449408593 and 449408602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (449405639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 799379 + ... + 799940.

It is an arithmetic number, because the mean of its divisors is an integer number (112752060).

Almost surely, 2^449408639 is an apocalyptic number.

449408639 is a deficient number, since it is larger than the sum of its proper divisors (1599601).

449408639 is a wasteful number, since it uses less digits than its factorization.

449408639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1599600.

The product of its (nonzero) digits is 746496, while the sum is 47.

The square root of 449408639 is about 21199.2603408704. The cubic root of 449408639 is about 765.9736070867.

The spelling of 449408639 in words is "four hundred forty-nine million, four hundred eight thousand, six hundred thirty-nine".