681750408 has 64 divisors (see below), whose sum is σ = 1743206400. Its totient is φ = 222131520.

The previous prime is 681750403. The next prime is 681750427. The reversal of 681750408 is 804057186.

It is not an unprimeable number, because it can be changed into a prime (681750401) 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 15 ways as a sum of consecutive naturals, for example, 193543 + ... + 197033.

It is an arithmetic number, because the mean of its divisors is an integer number (27237600).

Almost surely, 2^681750408 is an apocalyptic number.

It is an amenable number.

681750408 is an abundant number, since it is smaller than the sum of its proper divisors (1061455992).

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

681750408 is a wasteful number, since it uses less digits than its factorization.

681750408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3682 (or 3678 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 39.

The square root of 681750408 is about 26110.3505912885. The cubic root of 681750408 is about 880.1198218384.

The spelling of 681750408 in words is "six hundred eighty-one million, seven hundred fifty thousand, four hundred eight".