678518878 has 8 divisors (see below), whose sum is σ = 1018618272. Its totient is φ = 338979456.

The previous prime is 678518857. The next prime is 678518903. The reversal of 678518878 is 878815876.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136950 + ... + 141817.

It is an arithmetic number, because the mean of its divisors is an integer number (127327284).

Almost surely, 2^678518878 is an apocalyptic number.

678518878 is a deficient number, since it is larger than the sum of its proper divisors (340099394).

678518878 is a wasteful number, since it uses less digits than its factorization.

678518878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279986.

The product of its digits is 6021120, while the sum is 58.

The square root of 678518878 is about 26048.3949217605. The cubic root of 678518878 is about 878.7270153104.

It can be divided in two parts, 67851 and 8878, that added together give a square (76729 = 277²).

The spelling of 678518878 in words is "six hundred seventy-eight million, five hundred eighteen thousand, eight hundred seventy-eight".