It is a d-powerful number, because it can be written as 33 + 94 + 4 + 215 + 43 .
It is a congruent number.
It is an unprimeable number.
39424 is a Friedman number, since it can be written as (3^4-4)*2^9, using all its digits and the basic arithmetic operations.
239424 is an apocalyptic number.
39424 is a droll number since its even prime factors and its odd prime factors have the same sum.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 39424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49104).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
39424 is an equidigital number, since it uses as much as digits as its factorization.
39424 is an evil number, because the sum of its binary digits is even.
The square root of 39424 is about 198.5547783359. The cubic root of 39424 is about 34.0345669209.
The spelling of 39424 in words is "thirty-nine thousand, four hundred twenty-four".