Adding to 447720 its sum of digits (24), we get a palindrome (447744).
447720 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.
It is a d-powerful number, because it can be written as 48 + 49 + 73 + 76 + 211 + 0 .
It is an unprimeable number.
447720 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
2447720 is an apocalyptic number.
447720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 447720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (846720).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
447720 is a wasteful number, since it uses less digits than its factorization.
447720 is an evil number, because the sum of its binary digits is even.
The square root of 447720 is about 669.1188235284. The cubic root of 447720 is about 76.5013028955.
The spelling of 447720 in words is "four hundred forty-seven thousand, seven hundred twenty", and thus it is an iban number.