778304346 has 16 divisors (see below), whose sum is σ = 1563292224. Its totient is φ = 258320864.

The previous prime is 778304333. The next prime is 778304347. The reversal of 778304346 is 643403877.

It is a junction number, because it is equal to n+sod(n) for n = 778304298 and 778304307.

It is not an unprimeable number, because it can be changed into a prime (778304347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 276966 + ... + 279761.

It is an arithmetic number, because the mean of its divisors is an integer number (97705764).

Almost surely, 2^778304346 is an apocalyptic number.

778304346 is an abundant number, since it is smaller than the sum of its proper divisors (784987878).

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

778304346 is a wasteful number, since it uses less digits than its factorization.

778304346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556965.

The product of its (nonzero) digits is 338688, while the sum is 42.

The square root of 778304346 is about 27898.1064948860. The cubic root of 778304346 is about 919.8488827091.

The spelling of 778304346 in words is "seven hundred seventy-eight million, three hundred four thousand, three hundred forty-six".