778083720 has 32 divisors (see below), whose sum is σ = 2334251520. Its totient is φ = 207488960.

The previous prime is 778083707. The next prime is 778083737. The reversal of 778083720 is 27380877.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3241896 + ... + 3242135.

It is an arithmetic number, because the mean of its divisors is an integer number (72945360).

Almost surely, 2^778083720 is an apocalyptic number.

It is an amenable number.

778083720 is an abundant number, since it is smaller than the sum of its proper divisors (1556167800).

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

778083720 is a wasteful number, since it uses less digits than its factorization.

778083720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6484045 (or 6484041 counting only the distinct ones).

The product of its (nonzero) digits is 131712, while the sum is 42.

The square root of 778083720 is about 27894.1520753007. The cubic root of 778083720 is about 919.7619579477.

The spelling of 778083720 in words is "seven hundred seventy-eight million, eighty-three thousand, seven hundred twenty".