306644 has 12 divisors (see below), whose sum is σ = 578004. Its totient is φ = 141504.

The previous prime is 306643. The next prime is 306653. The reversal of 306644 is 446603.

It can be written as a sum of positive squares in 2 ways, for example, as 169744 + 136900 = 412^2 + 370^2 .

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 (306643) 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, 2897 + ... + 3000.

It is an arithmetic number, because the mean of its divisors is an integer number (48167).

2³⁰⁶⁶⁴⁴ is an apocalyptic number.

It is an amenable number.

306644 is a deficient number, since it is larger than the sum of its proper divisors (271360).

306644 is a wasteful number, since it uses less digits than its factorization.

306644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5914 (or 5912 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 306644 is about 553.7544582213. The cubic root of 306644 is about 67.4338813003.

The spelling of 306644 in words is "three hundred six thousand, six hundred forty-four".