It is a happy number.
It is an unprimeable number.
Almost surely, 213409472 is an apocalyptic number.
13409472 is a gapful number since it is divisible by the number (12) 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 13409472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17877536).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
13409472 is a wasteful number, since it uses less digits than its factorization.
13409472 is an evil number, because the sum of its binary digits is even.
The square root of 13409472 is about 3661.8945916015. The cubic root of 13409472 is about 237.5767257185.
The spelling of 13409472 in words is "thirteen million, four hundred nine thousand, four hundred seventy-two".