681868032 has 36 divisors (see below), whose sum is σ = 1814765400. Its totient is φ = 227289088.

The previous prime is 681868021. The next prime is 681868037. The reversal of 681868032 is 230868186.

It is not an unprimeable number, because it can be changed into a prime (681868037) 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 3 ways as a sum of consecutive naturals, for example, 443157 + ... + 444692.

It is an arithmetic number, because the mean of its divisors is an integer number (50410150).

Almost surely, 2^681868032 is an apocalyptic number.

It is an amenable number.

681868032 is an abundant number, since it is smaller than the sum of its proper divisors (1132897368).

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

681868032 is an equidigital number, since it uses as much as digits as its factorization.

681868032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887868 (or 887854 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 42.

The square root of 681868032 is about 26112.6029342155. The cubic root of 681868032 is about 880.1704353081.

The spelling of 681868032 in words is "six hundred eighty-one million, eight hundred sixty-eight thousand, thirty-two".