778808862 has 192 divisors, whose sum is σ = 2049727680. Its totient is φ = 211341312.

The previous prime is 778808861. The next prime is 778808873. The reversal of 778808862 is 268808877.

It is a junction number, because it is equal to n+sod(n) for n = 778808799 and 778808808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (778808861) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4960488 + ... + 4960644.

It is an arithmetic number, because the mean of its divisors is an integer number (10675665).

Almost surely, 2^778808862 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 778808862, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1024863840).

778808862 is an abundant number, since it is smaller than the sum of its proper divisors (1270918818).

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

778808862 is a wasteful number, since it uses less digits than its factorization.

778808862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267 (or 264 counting only the distinct ones).

The product of its (nonzero) digits is 2408448, while the sum is 54.

The square root of 778808862 is about 27907.1471490728. The cubic root of 778808862 is about 920.0475959938.

The spelling of 778808862 in words is "seven hundred seventy-eight million, eight hundred eight thousand, eight hundred sixty-two".