678543916 has 12 divisors (see below), whose sum is σ = 1257302088. Its totient is φ = 319314752.

The previous prime is 678543893. The next prime is 678543919. The reversal of 678543916 is 619345876.

It is a self number, because there is not a number n which added to its sum of digits gives 678543916.

It is not an unprimeable number, because it can be changed into a prime (678543919) 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, 4989226 + ... + 4989361.

It is an arithmetic number, because the mean of its divisors is an integer number (104775174).

Almost surely, 2^678543916 is an apocalyptic number.

It is an amenable number.

678543916 is a deficient number, since it is larger than the sum of its proper divisors (578758172).

678543916 is a wasteful number, since it uses less digits than its factorization.

678543916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9978608 (or 9978606 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 49.

The square root of 678543916 is about 26048.8755227553. The cubic root of 678543916 is about 878.7378238018.

The spelling of 678543916 in words is "six hundred seventy-eight million, five hundred forty-three thousand, nine hundred sixteen".