678838216 has 16 divisors (see below), whose sum is σ = 1454653440. Its totient is φ = 290930640.

The previous prime is 678838207. The next prime is 678838229. The reversal of 678838216 is 612838876.

It is a self number, because there is not a number n which added to its sum of digits gives 678838216.

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, 6061000 + ... + 6061111.

It is an arithmetic number, because the mean of its divisors is an integer number (90915840).

Almost surely, 2^678838216 is an apocalyptic number.

It is an amenable number.

678838216 is an abundant number, since it is smaller than the sum of its proper divisors (775815224).

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

678838216 is a wasteful number, since it uses less digits than its factorization.

678838216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12122124 (or 12122120 counting only the distinct ones).

The product of its digits is 774144, while the sum is 49.

The square root of 678838216 is about 26054.5239066079. The cubic root of 678838216 is about 878.8648483298.

The spelling of 678838216 in words is "six hundred seventy-eight million, eight hundred thirty-eight thousand, two hundred sixteen".