18878400 is a `hidden beast` number, since 188 + 78 + 400 = 666.
It is a zygodrome in base 8.
It is a congruent number.
It is an unprimeable number.
Almost surely, 218878400 is an apocalyptic number.
18878400 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 18878400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37795200).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
18878400 is a wasteful number, since it uses less digits than its factorization.
18878400 is an evil number, because the sum of its binary digits is even.
The square root of 18878400 is about 4344.9280776556. The cubic root of 18878400 is about 266.2696870981.
The spelling of 18878400 in words is "eighteen million, eight hundred seventy-eight thousand, four hundred".