778888860 has 24 divisors (see below), whose sum is σ = 2180888976. Its totient is φ = 207703680.

The previous prime is 778888853. The next prime is 778888861. The reversal of 778888860 is 68888877.

It is a Harshad number since it is a multiple of its sum of digits (60), and also a Moran number because the ratio is a prime number: 12981481 = 778888860 / (7 + 7 + 8 + 8 + 8 + 8 + 8 + 6 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 778888794 and 778888803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (778888861) 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 7 ways as a sum of consecutive naturals, for example, 6490681 + ... + 6490800.

It is an arithmetic number, because the mean of its divisors is an integer number (90870374).

Almost surely, 2^778888860 is an apocalyptic number.

It is an amenable number.

778888860 is an abundant number, since it is smaller than the sum of its proper divisors (1402000116).

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

778888860 is a wasteful number, since it uses less digits than its factorization.

778888860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12981493 (or 12981491 counting only the distinct ones).

The product of its (nonzero) digits is 9633792, while the sum is 60.

The square root of 778888860 is about 27908.5804010165. The cubic root of 778888860 is about 920.0790968542.

The spelling of 778888860 in words is "seven hundred seventy-eight million, eight hundred eighty-eight thousand, eight hundred sixty".