678657412 has 24 divisors (see below), whose sum is σ = 1260302400. Its totient is φ = 319071456.

The previous prime is 678657407. The next prime is 678657457. The reversal of 678657412 is 214756876.

It is a happy number.

678657412 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57087 + ... + 67942.

It is an arithmetic number, because the mean of its divisors is an integer number (52512600).

Almost surely, 2^678657412 is an apocalyptic number.

It is an amenable number.

678657412 is a deficient number, since it is larger than the sum of its proper divisors (581644988).

678657412 is a wasteful number, since it uses less digits than its factorization.

678657412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125115 (or 125113 counting only the distinct ones).

The product of its digits is 564480, while the sum is 46.

The square root of 678657412 is about 26051.0539518078. The cubic root of 678657412 is about 878.7868148181.

The spelling of 678657412 in words is "six hundred seventy-eight million, six hundred fifty-seven thousand, four hundred twelve".