684806376 has 64 divisors (see below), whose sum is σ = 1815583680. Its totient is φ = 214502400.

The previous prime is 684806371. The next prime is 684806389. The reversal of 684806376 is 673608486.

It is a happy number.

It is a super-2 number, since 2×684806376² = 937919545220506752, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (684806371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 428010 + ... + 429606.

It is an arithmetic number, because the mean of its divisors is an integer number (28368495).

Almost surely, 2^684806376 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 684806376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (907791840).

684806376 is an abundant number, since it is smaller than the sum of its proper divisors (1130777304).

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

684806376 is a wasteful number, since it uses less digits than its factorization.

684806376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2674 (or 2670 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 48.

The square root of 684806376 is about 26168.8053987950. The cubic root of 684806376 is about 881.4329168715.

The spelling of 684806376 in words is "six hundred eighty-four million, eight hundred six thousand, three hundred seventy-six".