306845 has 16 divisors (see below), whose sum is σ = 459648. Its totient is φ = 191040.

The previous prime is 306829. The next prime is 306847. The reversal of 306845 is 548603.

It is not a de Polignac number, because 306845 - 2⁴ = 306829 is a prime.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (306847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14 + ... + 783.

It is an arithmetic number, because the mean of its divisors is an integer number (28728).

2³⁰⁶⁸⁴⁵ is an apocalyptic number.

306845 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

306845 is a deficient number, since it is larger than the sum of its proper divisors (152803).

306845 is a wasteful number, since it uses less digits than its factorization.

306845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 306845 is about 553.9359168713. The cubic root of 306845 is about 67.4486120083.

It can be divided in two parts, 3068 and 45, that added together give a palindrome (3113).

The spelling of 306845 in words is "three hundred six thousand, eight hundred forty-five".