678767312 has 10 divisors (see below), whose sum is σ = 1315111698. Its totient is φ = 339383648.

The previous prime is 678767303. The next prime is 678767321. The reversal of 678767312 is 213767876.

It is an interprime number because it is at equal distance from previous prime (678767303) and next prime (678767321).

It can be written as a sum of positive squares in only one way, i.e., 649434256 + 29333056 = 25484^2 + 5416^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21211463 + ... + 21211494.

Almost surely, 2^678767312 is an apocalyptic number.

It is an amenable number.

678767312 is a deficient number, since it is larger than the sum of its proper divisors (636344386).

678767312 is a wasteful number, since it uses less digits than its factorization.

678767312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42422965 (or 42422959 counting only the distinct ones).

The product of its digits is 592704, while the sum is 47.

The square root of 678767312 is about 26053.1631860701. The cubic root of 678767312 is about 878.8342484011.

The spelling of 678767312 in words is "six hundred seventy-eight million, seven hundred sixty-seven thousand, three hundred twelve".