681843846 has 16 divisors (see below), whose sum is σ = 1377747504. Its totient is φ = 224937984.

The previous prime is 681843839. The next prime is 681843889. The reversal of 681843846 is 648348186.

It is a super-2 number, since 2×681843846² = 929822060656143432, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 681843795 and 681843804.

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 7 ways as a sum of consecutive naturals, for example, 585195 + ... + 586358.

It is an arithmetic number, because the mean of its divisors is an integer number (86109219).

Almost surely, 2^681843846 is an apocalyptic number.

681843846 is an abundant number, since it is smaller than the sum of its proper divisors (695903658).

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

681843846 is a wasteful number, since it uses less digits than its factorization.

681843846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1171655.

The product of its digits is 884736, while the sum is 48.

The square root of 681843846 is about 26112.1398203977. The cubic root of 681843846 is about 880.1600285760.

The spelling of 681843846 in words is "six hundred eighty-one million, eight hundred forty-three thousand, eight hundred forty-six".