684816416 has 24 divisors (see below), whose sum is σ = 1356829740. Its totient is φ = 340224768.

The previous prime is 684816397. The next prime is 684816427. The reversal of 684816416 is 614618486.

It can be written as a sum of positive squares in 2 ways, for example, as 600250000 + 84566416 = 24500^2 + 9196^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63131 + ... + 73178.

Almost surely, 2^684816416 is an apocalyptic number.

It is an amenable number.

684816416 is a deficient number, since it is larger than the sum of its proper divisors (672013324).

684816416 is a wasteful number, since it uses less digits than its factorization.

684816416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136476 (or 136468 counting only the distinct ones).

The product of its digits is 221184, while the sum is 44.

The square root of 684816416 is about 26168.9972295463. The cubic root of 684816416 is about 881.4372244362.

The spelling of 684816416 in words is "six hundred eighty-four million, eight hundred sixteen thousand, four hundred sixteen".