681735886 has 32 divisors (see below), whose sum is σ = 1141943040. Its totient is φ = 303077376.

The previous prime is 681735883. The next prime is 681735907. The reversal of 681735886 is 688537186.

681735886 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681735881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 434275 + ... + 435841.

It is an arithmetic number, because the mean of its divisors is an integer number (35685720).

Almost surely, 2^681735886 is an apocalyptic number.

681735886 is a deficient number, since it is larger than the sum of its proper divisors (460207154).

681735886 is a wasteful number, since it uses less digits than its factorization.

681735886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2188.

The product of its digits is 1935360, while the sum is 52.

The square root of 681735886 is about 26110.0725008568. The cubic root of 681735886 is about 880.1135726351.

The spelling of 681735886 in words is "six hundred eighty-one million, seven hundred thirty-five thousand, eight hundred eighty-six".