678563878 has 8 divisors (see below), whose sum is σ = 1034532000. Its totient is φ = 333719880.

The previous prime is 678563849. The next prime is 678563881. The reversal of 678563878 is 878365876.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2780878 + ... + 2781121.

It is an arithmetic number, because the mean of its divisors is an integer number (129316500).

Almost surely, 2^678563878 is an apocalyptic number.

678563878 is a deficient number, since it is larger than the sum of its proper divisors (355968122).

678563878 is a wasteful number, since it uses less digits than its factorization.

678563878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5562062.

The product of its digits is 13547520, while the sum is 58.

The square root of 678563878 is about 26049.2586842697. The cubic root of 678563878 is about 878.7464408773.

The spelling of 678563878 in words is "six hundred seventy-eight million, five hundred sixty-three thousand, eight hundred seventy-eight".