778410216 has 64 divisors (see below), whose sum is σ = 2167440000. Its totient is φ = 258847488.

The previous prime is 778410211. The next prime is 778410277. The reversal of 778410216 is 612014877.

778410216 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (778410211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90720 + ... + 98928.

It is an arithmetic number, because the mean of its divisors is an integer number (33866250).

Almost surely, 2^778410216 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 778410216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1083720000).

778410216 is an abundant number, since it is smaller than the sum of its proper divisors (1389029784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

778410216 is a wasteful number, since it uses less digits than its factorization.

778410216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8663 (or 8653 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 778410216 is about 27900.0038709675. The cubic root of 778410216 is about 919.8905887531.

The spelling of 778410216 in words is "seven hundred seventy-eight million, four hundred ten thousand, two hundred sixteen".