305386 has 16 divisors (see below), whose sum is σ = 484704. Its totient is φ = 144144.

The previous prime is 305377. The next prime is 305401. The reversal of 305386 is 683503.

305386 = T₆₀ + T₆₁ + ... + T₁₂₆.

It is a plaindrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 305386.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4525 + ... + 4591.

It is an arithmetic number, because the mean of its divisors is an integer number (30294).

2³⁰⁵³⁸⁶ is an apocalyptic number.

305386 is a deficient number, since it is larger than the sum of its proper divisors (179318).

305386 is a wasteful number, since it uses less digits than its factorization.

305386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 305386 is about 552.6174083396. The cubic root of 305386 is about 67.3415395895.

Adding to 305386 its reverse (683503), we get a palindrome (988889).

The spelling of 305386 in words is "three hundred five thousand, three hundred eighty-six".