It is a tau number, because it is divible by the number of its divisors (64).
It is a congruent number.
It is an unprimeable number.
Almost surely, 231947648 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 31947648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42725760).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
31947648 is a wasteful number, since it uses less digits than its factorization.
31947648 is an evil number, because the sum of its binary digits is even.
The square root of 31947648 is about 5652.2250485981. The cubic root of 31947648 is about 317.3069833514.
The spelling of 31947648 in words is "thirty-one million, nine hundred forty-seven thousand, six hundred forty-eight".