684857376 has 192 divisors, whose sum is σ = 2417506560. Its totient is φ = 184135680.

The previous prime is 684857357. The next prime is 684857387. The reversal of 684857376 is 673758486.

684857376 is a `hidden beast` number, since 68 + 4 + 8 + 573 + 7 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 99486 + ... + 106146.

It is an arithmetic number, because the mean of its divisors is an integer number (12591180).

Almost surely, 2^684857376 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 684857376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1208753280).

684857376 is an abundant number, since it is smaller than the sum of its proper divisors (1732649184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

684857376 is a wasteful number, since it uses less digits than its factorization.

684857376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6704 (or 6690 counting only the distinct ones).

The product of its digits is 6773760, while the sum is 54.

The square root of 684857376 is about 26169.7798233000. The cubic root of 684857376 is about 881.4547974908.

The spelling of 684857376 in words is "six hundred eighty-four million, eight hundred fifty-seven thousand, three hundred seventy-six".