Multipling 40304 by its sum of digits (11), we get a palindrome (443344).
40304 is nontrivially palindromic in base 10.
40304 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a congruent number.
It is an unprimeable number.
40304 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
240304 is an apocalyptic number.
40304 is a gapful number since it is divisible by the number (44) 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 40304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42780).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
40304 is a wasteful number, since it uses less digits than its factorization.
40304 is an evil number, because the sum of its binary digits is even.
The square root of 40304 is about 200.7585614613. The cubic root of 40304 is about 34.2859391520.
The spelling of 40304 in words is "forty thousand, three hundred four", and thus it is an iban number.