681788000 has 48 divisors (see below), whose sum is σ = 1675162944. Its totient is φ = 272713600.

The previous prime is 681787993. The next prime is 681788017. The reversal of 681788000 is 887186.

It is a congruent number.

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, 81224 + ... + 89223.

It is an arithmetic number, because the mean of its divisors is an integer number (34899228).

Almost surely, 2^681788000 is an apocalyptic number.

It is an amenable number.

681788000 is an abundant number, since it is smaller than the sum of its proper divisors (993374944).

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

681788000 is a wasteful number, since it uses less digits than its factorization.

681788000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170472 (or 170454 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 38.

The square root of 681788000 is about 26111.0704491409. The cubic root of 681788000 is about 880.1359982650.

The spelling of 681788000 in words is "six hundred eighty-one million, seven hundred eighty-eight thousand".