678473656 has 16 divisors (see below), whose sum is σ = 1453872240. Its totient is φ = 290774400.

The previous prime is 678473639. The next prime is 678473687. The reversal of 678473656 is 656374876.

It is a happy number.

678473656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 6057745 + ... + 6057856.

It is an arithmetic number, because the mean of its divisors is an integer number (90867015).

Almost surely, 2^678473656 is an apocalyptic number.

It is an amenable number.

678473656 is an abundant number, since it is smaller than the sum of its proper divisors (775398584).

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

678473656 is a wasteful number, since it uses less digits than its factorization.

678473656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12115614 (or 12115610 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 52.

The square root of 678473656 is about 26047.5268691674. The cubic root of 678473656 is about 878.7074930455.

The spelling of 678473656 in words is "six hundred seventy-eight million, four hundred seventy-three thousand, six hundred fifty-six".