778378822 has 16 divisors (see below), whose sum is σ = 1275093792. Its totient is φ = 354191040.

The previous prime is 778378801. The next prime is 778378823. The reversal of 778378822 is 228873877.

It is a happy number.

778378822 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 778378822.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (778378823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208983 + ... + 212674.

It is an arithmetic number, because the mean of its divisors is an integer number (79693362).

Almost surely, 2^778378822 is an apocalyptic number.

778378822 is a deficient number, since it is larger than the sum of its proper divisors (496714970).

778378822 is a wasteful number, since it uses less digits than its factorization.

778378822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421743.

The product of its digits is 2107392, while the sum is 52.

The square root of 778378822 is about 27899.4412488853. The cubic root of 778378822 is about 919.8782219090.

The spelling of 778378822 in words is "seven hundred seventy-eight million, three hundred seventy-eight thousand, eight hundred twenty-two".