305686345 has 16 divisors (see below), whose sum is σ = 386628480. Its totient is φ = 231379200.

The previous prime is 305686327. The next prime is 305686349. The reversal of 305686345 is 543686503.

It is not a de Polignac number, because 305686345 - 2⁷ = 305686217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 305686298 and 305686307.

It is not an unprimeable number, because it can be changed into a prime (305686349) 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, 96385 + ... + 99505.

It is an arithmetic number, because the mean of its divisors is an integer number (24164280).

Almost surely, 2^305686345 is an apocalyptic number.

It is an amenable number.

305686345 is a deficient number, since it is larger than the sum of its proper divisors (80942135).

305686345 is a wasteful number, since it uses less digits than its factorization.

305686345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4176.

The product of its (nonzero) digits is 259200, while the sum is 40.

The square root of 305686345 is about 17483.8881545267. Note that the first 3 decimals coincide. The cubic root of 305686345 is about 673.6360900082.

It can be divided in two parts, 3056 and 86345, that added together give a square (89401 = 299²).

The spelling of 305686345 in words is "three hundred five million, six hundred eighty-six thousand, three hundred forty-five".