678755788 has 24 divisors (see below), whose sum is σ = 1268426880. Its totient is φ = 317103360.

The previous prime is 678755743. The next prime is 678755797. The reversal of 678755788 is 887557876.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90781 + ... + 97972.

It is an arithmetic number, because the mean of its divisors is an integer number (52851120).

Almost surely, 2^678755788 is an apocalyptic number.

It is an amenable number.

678755788 is a deficient number, since it is larger than the sum of its proper divisors (589671092).

678755788 is a wasteful number, since it uses less digits than its factorization.

678755788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188817 (or 188815 counting only the distinct ones).

The product of its digits is 26342400, while the sum is 61.

The square root of 678755788 is about 26052.9420219675. The cubic root of 678755788 is about 878.8292748051.

The spelling of 678755788 in words is "six hundred seventy-eight million, seven hundred fifty-five thousand, seven hundred eighty-eight".