305681841 has 6 divisors (see below), whose sum is σ = 441540450. Its totient is φ = 203787888.

The previous prime is 305681839. The next prime is 305681851. The reversal of 305681841 is 148186503.

It can be written as a sum of positive squares in only one way, i.e., 220968225 + 84713616 = 14865^2 + 9204^2 .

It is not a de Polignac number, because 305681841 - 2¹ = 305681839 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 305681796 and 305681805.

It is not an unprimeable number, because it can be changed into a prime (305681801) 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 5 ways as a sum of consecutive naturals, for example, 16982316 + ... + 16982333.

It is an arithmetic number, because the mean of its divisors is an integer number (73590075).

Almost surely, 2^305681841 is an apocalyptic number.

It is an amenable number.

305681841 is a deficient number, since it is larger than the sum of its proper divisors (135858609).

305681841 is a wasteful number, since it uses less digits than its factorization.

305681841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33964655 (or 33964652 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 305681841 is about 17483.7593497508. The cubic root of 305681841 is about 673.6327815278.

The spelling of 305681841 in words is "three hundred five million, six hundred eighty-one thousand, eight hundred forty-one".