It is a nude number because it is divisible by every one of its digits.
It is a zygodrome in base 6.
It is a congruent number.
It is an unprimeable number.
Almost surely, 278386616 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 78386616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136952640).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
78386616 is a wasteful number, since it uses less digits than its factorization.
78386616 is an evil number, because the sum of its binary digits is even.
The square root of 78386616 is about 8853.6216318521. The cubic root of 78386616 is about 427.9706358869.
The spelling of 78386616 in words is "seventy-eight million, three hundred eighty-six thousand, six hundred sixteen".