Subtracting 40448 from its reverse (84404), we obtain a triangular number (43956 = T296).
40448 is nontrivially palindromic in base 3.
It is a congruent number.
It is an unprimeable number.
40448 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
240448 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 40448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40920).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
40448 is an frugal number, since it uses more digits than its factorization.
40448 is an odious number, because the sum of its binary digits is odd.
The square root of 40448 is about 201.1168814396. The cubic root of 40448 is about 34.3267234162.
The spelling of 40448 in words is "forty thousand, four hundred forty-eight".