678394770 has 16 divisors (see below), whose sum is σ = 1628147520. Its totient is φ = 180905264.

The previous prime is 678394747. The next prime is 678394777. The reversal of 678394770 is 77493876.

It is not an unprimeable number, because it can be changed into a prime (678394777) 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 7 ways as a sum of consecutive naturals, for example, 11306550 + ... + 11306609.

It is an arithmetic number, because the mean of its divisors is an integer number (101759220).

Almost surely, 2^678394770 is an apocalyptic number.

678394770 is an abundant number, since it is smaller than the sum of its proper divisors (949752750).

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

678394770 is a wasteful number, since it uses less digits than its factorization.

678394770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22613169.

The product of its (nonzero) digits is 1778112, while the sum is 51.

The square root of 678394770 is about 26046.0125547079. The cubic root of 678394770 is about 878.6734360091.

The spelling of 678394770 in words is "six hundred seventy-eight million, three hundred ninety-four thousand, seven hundred seventy".