681303808 has 36 divisors (see below), whose sum is σ = 1366499848. Its totient is φ = 339010560.

The previous prime is 681303797. The next prime is 681303809. The reversal of 681303808 is 808303186.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681303809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47710 + ... + 60322.

Almost surely, 2^681303808 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 681303808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (683249924).

681303808 is an abundant number, since it is smaller than the sum of its proper divisors (685196040).

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

681303808 is a wasteful number, since it uses less digits than its factorization.

681303808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12840 (or 12826 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 681303808 is about 26101.7970262586. The cubic root of 681303808 is about 879.9275973490.

The spelling of 681303808 in words is "six hundred eighty-one million, three hundred three thousand, eight hundred eight".