778683220 has 48 divisors (see below), whose sum is σ = 1870662528. Its totient is φ = 266716800.

The previous prime is 778683211. The next prime is 778683221. The reversal of 778683220 is 22386877.

778683220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (778683221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 190195 + ... + 194245.

It is an arithmetic number, because the mean of its divisors is an integer number (38972136).

Almost surely, 2^778683220 is an apocalyptic number.

778683220 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

778683220 is an abundant number, since it is smaller than the sum of its proper divisors (1091979308).

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

778683220 is a wasteful number, since it uses less digits than its factorization.

778683220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5440 (or 5438 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 43.

The square root of 778683220 is about 27904.8959861885. The cubic root of 778683220 is about 919.9981175135.

The spelling of 778683220 in words is "seven hundred seventy-eight million, six hundred eighty-three thousand, two hundred twenty".