It is a congruent number.
It is an unprimeable number.
Almost surely, 212478440 is an apocalyptic number.
12478440 is a gapful number since it is divisible by the number (10) 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 12478440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21268800).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
12478440 is a wasteful number, since it uses less digits than its factorization.
12478440 is an odious number, because the sum of its binary digits is odd.
The square root of 12478440 is about 3532.4835456092. The cubic root of 12478440 is about 231.9459346866.
The spelling of 12478440 in words is "twelve million, four hundred seventy-eight thousand, four hundred forty".