447721456 has 120 divisors (see below), whose sum is σ = 1100644832. Its totient is φ = 171763200.

The previous prime is 447721433. The next prime is 447721511. The reversal of 447721456 is 654127744.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 6305901 + ... + 6305971.

Almost surely, 2^447721456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 447721456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (550322416).

447721456 is an abundant number, since it is smaller than the sum of its proper divisors (652923376).

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

447721456 is a wasteful number, since it uses less digits than its factorization.

447721456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231 (or 154 counting only the distinct ones).

The product of its digits is 188160, while the sum is 40.

The square root of 447721456 is about 21159.4294819118. The cubic root of 447721456 is about 765.0138582364.

The spelling of 447721456 in words is "four hundred forty-seven million, seven hundred twenty-one thousand, four hundred fifty-six".