778190994 has 24 divisors (see below), whose sum is σ = 1926949440. Its totient is φ = 222340248.

The previous prime is 778190981. The next prime is 778191053. The reversal of 778190994 is 499091877.

It is a self number, because there is not a number n which added to its sum of digits gives 778190994.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3087934 + ... + 3088185.

It is an arithmetic number, because the mean of its divisors is an integer number (80289560).

Almost surely, 2^778190994 is an apocalyptic number.

778190994 is an abundant number, since it is smaller than the sum of its proper divisors (1148758446).

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

778190994 is a wasteful number, since it uses less digits than its factorization.

778190994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6176134 (or 6176131 counting only the distinct ones).

The product of its (nonzero) digits is 1143072, while the sum is 54.

The square root of 778190994 is about 27896.0748851877. The cubic root of 778190994 is about 919.8042250404.

The spelling of 778190994 in words is "seven hundred seventy-eight million, one hundred ninety thousand, nine hundred ninety-four".