449640816 has 40 divisors (see below), whose sum is σ = 1174634640. Its totient is φ = 148194816.

The previous prime is 449640773. The next prime is 449640827. The reversal of 449640816 is 618046944.

It is a congruent number.

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, 48355 + ... + 56898.

It is an arithmetic number, because the mean of its divisors is an integer number (29365866).

Almost surely, 2^449640816 is an apocalyptic number.

It is an amenable number.

449640816 is an abundant number, since it is smaller than the sum of its proper divisors (724993824).

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

449640816 is a wasteful number, since it uses less digits than its factorization.

449640816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105353 (or 105347 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 42.

The square root of 449640816 is about 21204.7356974804. The cubic root of 449640816 is about 766.1054921326.

The spelling of 449640816 in words is "four hundred forty-nine million, six hundred forty thousand, eight hundred sixteen".