778875860 has 24 divisors (see below), whose sum is σ = 1869302400. Its totient is φ = 267043104.

The previous prime is 778875857. The next prime is 778875913. The reversal of 778875860 is 68578877.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 778875796 and 778875805.

It is a congruent number.

It is an unprimeable number.

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, 2781560 + ... + 2781839.

It is an arithmetic number, because the mean of its divisors is an integer number (77887600).

Almost surely, 2^778875860 is an apocalyptic number.

778875860 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

778875860 is an abundant number, since it is smaller than the sum of its proper divisors (1090426540).

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

778875860 is a wasteful number, since it uses less digits than its factorization.

778875860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5563415 (or 5563413 counting only the distinct ones).

The product of its (nonzero) digits is 5268480, while the sum is 56.

The square root of 778875860 is about 27908.3474967616. The cubic root of 778875860 is about 920.0739779832.

The spelling of 778875860 in words is "seven hundred seventy-eight million, eight hundred seventy-five thousand, eight hundred sixty".