681340008 has 32 divisors (see below), whose sum is σ = 1803548160. Its totient is φ = 213753600.

The previous prime is 681340001. The next prime is 681340013. The reversal of 681340008 is 800043186.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (681340001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 834568 + ... + 835383.

It is an arithmetic number, because the mean of its divisors is an integer number (56360880).

Almost surely, 2^681340008 is an apocalyptic number.

681340008 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

681340008 is an abundant number, since it is smaller than the sum of its proper divisors (1122208152).

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

681340008 is a wasteful number, since it uses less digits than its factorization.

681340008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1669977 (or 1669973 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 681340008 is about 26102.4904558933. The cubic root of 681340008 is about 879.9431815932.

The spelling of 681340008 in words is "six hundred eighty-one million, three hundred forty thousand, eight".