681433808 has 20 divisors (see below), whose sum is σ = 1440303648. Its totient is φ = 309742560.

The previous prime is 681433807. The next prime is 681433853. The reversal of 681433808 is 808334186.

It is a happy number.

681433808 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681433801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1935716 + ... + 1936067.

Almost surely, 2^681433808 is an apocalyptic number.

It is an amenable number.

681433808 is an abundant number, since it is smaller than the sum of its proper divisors (758869840).

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

681433808 is a wasteful number, since it uses less digits than its factorization.

681433808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3871802 (or 3871796 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 41.

The square root of 681433808 is about 26104.2871574766. The cubic root of 681433808 is about 879.9835602989.

The spelling of 681433808 in words is "six hundred eighty-one million, four hundred thirty-three thousand, eight hundred eight".