778679004 has 12 divisors (see below), whose sum is σ = 1816917704. Its totient is φ = 259559664.

The previous prime is 778679003. The next prime is 778679009. The reversal of 778679004 is 400976877.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (778679003) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 32444947 + ... + 32444970.

Almost surely, 2^778679004 is an apocalyptic number.

It is an amenable number.

778679004 is an abundant number, since it is smaller than the sum of its proper divisors (1038238700).

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

778679004 is a wasteful number, since it uses less digits than its factorization.

778679004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64889924 (or 64889922 counting only the distinct ones).

The product of its (nonzero) digits is 592704, while the sum is 48.

The square root of 778679004 is about 27904.8204437871. The cubic root of 778679004 is about 919.9964571382.

The spelling of 778679004 in words is "seven hundred seventy-eight million, six hundred seventy-nine thousand, four".