305606 has 16 divisors (see below), whose sum is σ = 532224. Its totient is φ = 128904.

The previous prime is 305603. The next prime is 305611. The reversal of 305606 is 606503.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1031 + ... + 1293.

It is an arithmetic number, because the mean of its divisors is an integer number (33264).

2³⁰⁵⁶⁰⁶ is an apocalyptic number.

305606 is a deficient number, since it is larger than the sum of its proper divisors (226618).

305606 is a wasteful number, since it uses less digits than its factorization.

305606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 305606 is about 552.8164252263. The cubic root of 305606 is about 67.3577066508.

The spelling of 305606 in words is "three hundred five thousand, six hundred six".