778648896 has 224 divisors, whose sum is σ = 2381097600. Its totient is φ = 249384960.

The previous prime is 778648891. The next prime is 778648907. The reversal of 778648896 is 698846877.

778648896 is a `hidden beast` number, since 77 + 86 + 488 + 9 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (778648891) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8748820 + ... + 8748908.

It is an arithmetic number, because the mean of its divisors is an integer number (10629900).

Almost surely, 2^778648896 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 778648896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1190548800).

778648896 is an abundant number, since it is smaller than the sum of its proper divisors (1602448704).

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

778648896 is a wasteful number, since it uses less digits than its factorization.

778648896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254 (or 238 counting only the distinct ones).

The product of its digits is 32514048, while the sum is 63.

The square root of 778648896 is about 27904.2809618883. The cubic root of 778648896 is about 919.9845996162.

The spelling of 778648896 in words is "seven hundred seventy-eight million, six hundred forty-eight thousand, eight hundred ninety-six".