681348880 has 40 divisors (see below), whose sum is σ = 1585612800. Its totient is φ = 272285568.

The previous prime is 681348869. The next prime is 681348893. The reversal of 681348880 is 88843186.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 681348880.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98991 + ... + 105649.

It is an arithmetic number, because the mean of its divisors is an integer number (39640320).

Almost surely, 2^681348880 is an apocalyptic number.

It is an amenable number.

681348880 is an abundant number, since it is smaller than the sum of its proper divisors (904263920).

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

681348880 is a wasteful number, since it uses less digits than its factorization.

681348880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7951 (or 7945 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 46.

The square root of 681348880 is about 26102.6604008097. The cubic root of 681348880 is about 879.9470009404.

The spelling of 681348880 in words is "six hundred eighty-one million, three hundred forty-eight thousand, eight hundred eighty".