305236 has 12 divisors (see below), whose sum is σ = 539028. Its totient is φ = 151232.

The previous prime is 305231. The next prime is 305237. The reversal of 305236 is 632503.

It can be written as a sum of positive squares in 2 ways, for example, as 93636 + 211600 = 306^2 + 460^2 .

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 270 + ... + 826.

It is an arithmetic number, because the mean of its divisors is an integer number (44919).

2³⁰⁵²³⁶ is an apocalyptic number.

It is an amenable number.

305236 is a deficient number, since it is larger than the sum of its proper divisors (233792).

305236 is a wasteful number, since it uses less digits than its factorization.

305236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698 (or 696 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 19.

The square root of 305236 is about 552.4816739042. The cubic root of 305236 is about 67.3305121409.

Adding to 305236 its reverse (632503), we get a palindrome (937739).

It can be divided in two parts, 30 and 5236, that multiplied together give a triangular number (157080 = T₅₆₀).

The spelling of 305236 in words is "three hundred five thousand, two hundred thirty-six".