678479864 has 16 divisors (see below), whose sum is σ = 1272445200. Its totient is φ = 339161152.

The previous prime is 678479819. The next prime is 678479869. The reversal of 678479864 is 468974876.

678479864 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678479869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44204 + ... + 57540.

It is an arithmetic number, because the mean of its divisors is an integer number (79527825).

Almost surely, 2^678479864 is an apocalyptic number.

It is an amenable number.

678479864 is a deficient number, since it is larger than the sum of its proper divisors (593965336).

678479864 is a wasteful number, since it uses less digits than its factorization.

678479864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19702 (or 19698 counting only the distinct ones).

The product of its digits is 16257024, while the sum is 59.

The square root of 678479864 is about 26047.6460356785. The cubic root of 678479864 is about 878.7101730805.

The spelling of 678479864 in words is "six hundred seventy-eight million, four hundred seventy-nine thousand, eight hundred sixty-four".