684440246 has 32 divisors (see below), whose sum is σ = 1184597568. Its totient is φ = 290528640.

The previous prime is 684440243. The next prime is 684440257. The reversal of 684440246 is 642044486.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684440243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1116236 + ... + 1116848.

It is an arithmetic number, because the mean of its divisors is an integer number (37018674).

Almost surely, 2^684440246 is an apocalyptic number.

684440246 is a deficient number, since it is larger than the sum of its proper divisors (500157322).

684440246 is a wasteful number, since it uses less digits than its factorization.

684440246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1256.

The product of its (nonzero) digits is 147456, while the sum is 38.

The square root of 684440246 is about 26161.8089206385. The cubic root of 684440246 is about 881.2758035735.

The spelling of 684440246 in words is "six hundred eighty-four million, four hundred forty thousand, two hundred forty-six".