306855 has 16 divisors (see below), whose sum is σ = 545760. Its totient is φ = 163584.

The previous prime is 306853. The next prime is 306857. The reversal of 306855 is 558603.

It is an interprime number because it is at equal distance from previous prime (306853) and next prime (306857).

It is not a de Polignac number, because 306855 - 2¹ = 306853 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

306855 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 306855.

It is not an unprimeable number, because it can be changed into a prime (306853) 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, 1002 + ... + 1271.

It is an arithmetic number, because the mean of its divisors is an integer number (34110).

2³⁰⁶⁸⁵⁵ is an apocalyptic number.

306855 is a deficient number, since it is larger than the sum of its proper divisors (238905).

306855 is a wasteful number, since it uses less digits than its factorization.

306855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2287 (or 2281 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 306855 is about 553.9449431126. The cubic root of 306855 is about 67.4493447114.

The spelling of 306855 in words is "three hundred six thousand, eight hundred fifty-five".