681704448 has 44 divisors (see below), whose sum is σ = 1816999080. Its totient is φ = 227233792.

The previous prime is 681704399. The next prime is 681704459. The reversal of 681704448 is 844407186.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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, 107883 + ... + 114026.

Almost surely, 2^681704448 is an apocalyptic number.

It is an amenable number.

681704448 is an abundant number, since it is smaller than the sum of its proper divisors (1135294632).

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

681704448 is a wasteful number, since it uses less digits than its factorization.

681704448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221932 (or 221914 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 42.

The square root of 681704448 is about 26109.4704657142. The cubic root of 681704448 is about 880.1000437224.

The spelling of 681704448 in words is "six hundred eighty-one million, seven hundred four thousand, four hundred forty-eight".