681044920 has 16 divisors (see below), whose sum is σ = 1532351160. Its totient is φ = 272417952.

The previous prime is 681044893. The next prime is 681044989. The reversal of 681044920 is 29440186.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8513022 + ... + 8513101.

Almost surely, 2^681044920 is an apocalyptic number.

It is an amenable number.

681044920 is an abundant number, since it is smaller than the sum of its proper divisors (851306240).

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

681044920 is a wasteful number, since it uses less digits than its factorization.

681044920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17026134 (or 17026130 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 681044920 is about 26096.8373562775. The cubic root of 681044920 is about 879.8161289392.

The spelling of 681044920 in words is "six hundred eighty-one million, forty-four thousand, nine hundred twenty".