778878760 has 64 divisors (see below), whose sum is σ = 1915462080. Its totient is φ = 282685440.

The previous prime is 778878757. The next prime is 778878767. The reversal of 778878760 is 67878877.

It is a junction number, because it is equal to n+sod(n) for n = 778878695 and 778878704.

It is not an unprimeable number, because it can be changed into a prime (778878767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 281544 + ... + 284296.

It is an arithmetic number, because the mean of its divisors is an integer number (29929095).

Almost surely, 2^778878760 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 778878760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (957731040).

778878760 is an abundant number, since it is smaller than the sum of its proper divisors (1136583320).

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

778878760 is a wasteful number, since it uses less digits than its factorization.

778878760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3418 (or 3414 counting only the distinct ones).

The product of its (nonzero) digits is 7375872, while the sum is 58.

The square root of 778878760 is about 27908.3994524946. The cubic root of 778878760 is about 920.0751198901.

The spelling of 778878760 in words is "seven hundred seventy-eight million, eight hundred seventy-eight thousand, seven hundred sixty".