Multipling 419904 by its product of nonzero digits (1296), we get a square (544195584 = 233282).
419904 divided by its product of nonzero digits (1296) gives a square (324 = 182).
The square root of 419904 is 648.
It is an ABA number since it can be written as A⋅BA, here for A=4, B=18.
It is a Duffinian number.
It is a nialpdrome in base 9.
It is an unprimeable number.
419904 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
419904 is a Friedman number, since it can be written as (9+9)^(4*(1+0))*4, using all its digits and the basic arithmetic operations.
2419904 is an apocalyptic number.
419904 is the 648-th square number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 419904
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
419904 is an frugal number, since it uses more digits than its factorization.
419904 is an evil number, because the sum of its binary digits is even.
The cubic root of 419904 is about 74.8830176299.
The spelling of 419904 in words is "four hundred nineteen thousand, nine hundred four".