305686196 has 12 divisors (see below), whose sum is σ = 540248100. Its totient is φ = 151329600.

The previous prime is 305686153. The next prime is 305686211. The reversal of 305686196 is 691686503.

305686196 = T₄₃₄ + T₄₃₅ + ... + T₁₂₄₁.

It can be written as a sum of positive squares in 2 ways, for example, as 202663696 + 103022500 = 14236^2 + 10150^2 .

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 377921 + ... + 378728.

It is an arithmetic number, because the mean of its divisors is an integer number (45020675).

Almost surely, 2^305686196 is an apocalyptic number.

It is an amenable number.

305686196 is a deficient number, since it is larger than the sum of its proper divisors (234561904).

305686196 is a wasteful number, since it uses less digits than its factorization.

305686196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756754 (or 756752 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 305686196 is about 17483.8838934603. The cubic root of 305686196 is about 673.6359805586.

The spelling of 305686196 in words is "three hundred five million, six hundred eighty-six thousand, one hundred ninety-six".