Almost surely, 2427221664 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 427221664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (436157568).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
427221664 is a wasteful number, since it uses less digits than its factorization.
427221664 is an evil number, because the sum of its binary digits is even.
The square root of 427221664 is about 20669.3411602789. The cubic root of 427221664 is about 753.1551019780.
The spelling of 427221664 in words is "four hundred twenty-seven million, two hundred twenty-one thousand, six hundred sixty-four".