305866 has 8 divisors (see below), whose sum is σ = 500544. Its totient is φ = 139020.

The previous prime is 305861. The next prime is 305867. The reversal of 305866 is 668503.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (305861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6930 + ... + 6973.

It is an arithmetic number, because the mean of its divisors is an integer number (62568).

2³⁰⁵⁸⁶⁶ is an apocalyptic number.

305866 is a deficient number, since it is larger than the sum of its proper divisors (194678).

305866 is a wasteful number, since it uses less digits than its factorization.

305866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13916.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 305866 is about 553.0515346692. The cubic root of 305866 is about 67.3768031777.

The spelling of 305866 in words is "three hundred five thousand, eight hundred sixty-six".