681878296 has 64 divisors (see below), whose sum is σ = 1499057280. Its totient is φ = 287316480.

The previous prime is 681878269. The next prime is 681878297. The reversal of 681878296 is 692878186.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681878297) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 96831 + ... + 103633.

It is an arithmetic number, because the mean of its divisors is an integer number (23422770).

Almost surely, 2^681878296 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 681878296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (749528640).

681878296 is an abundant number, since it is smaller than the sum of its proper divisors (817178984).

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

681878296 is a wasteful number, since it uses less digits than its factorization.

681878296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6904 (or 6900 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 55.

The square root of 681878296 is about 26112.7994669281. The cubic root of 681878296 is about 880.1748516192.

The spelling of 681878296 in words is "six hundred eighty-one million, eight hundred seventy-eight thousand, two hundred ninety-six".