678704912 has 20 divisors (see below), whose sum is σ = 1350532236. Its totient is φ = 330180480.

The previous prime is 678704911. The next prime is 678704969. The reversal of 678704912 is 219407876.

It can be written as a sum of positive squares in 2 ways, for example, as 272118016 + 406586896 = 16496^2 + 20164^2 .

It is not an unprimeable number, because it can be changed into a prime (678704911) 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, 572639 + ... + 573822.

Almost surely, 2^678704912 is an apocalyptic number.

It is an amenable number.

678704912 is a deficient number, since it is larger than the sum of its proper divisors (671827324).

678704912 is a wasteful number, since it uses less digits than its factorization.

678704912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1146506 (or 1146500 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 44.

The square root of 678704912 is about 26051.9656072243. The cubic root of 678704912 is about 878.8073167675.

The spelling of 678704912 in words is "six hundred seventy-eight million, seven hundred four thousand, nine hundred twelve".