449681856 has 56 divisors (see below), whose sum is σ = 1281312144. Its totient is φ = 138362880.

The previous prime is 449681849. The next prime is 449681861. The reversal of 449681856 is 658186944.

It is a junction number, because it is equal to n+sod(n) for n = 449681799 and 449681808.

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, 87585 + ... + 92576.

It is an arithmetic number, because the mean of its divisors is an integer number (22880574).

Almost surely, 2^449681856 is an apocalyptic number.

It is an amenable number.

449681856 is an abundant number, since it is smaller than the sum of its proper divisors (831630288).

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

449681856 is a wasteful number, since it uses less digits than its factorization.

449681856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180189 (or 180179 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 51.

The square root of 449681856 is about 21205.7033837598. The cubic root of 449681856 is about 766.1287996348.

The spelling of 449681856 in words is "four hundred forty-nine million, six hundred eighty-one thousand, eight hundred fifty-six".