306620 has 12 divisors (see below), whose sum is σ = 643944. Its totient is φ = 122640.

The previous prime is 306589. The next prime is 306643. The reversal of 306620 is 26603.

It is a nialpdrome in base 13.

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 306620.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 7646 + ... + 7685.

It is an arithmetic number, because the mean of its divisors is an integer number (53662).

2³⁰⁶⁶²⁰ is an apocalyptic number.

It is an amenable number.

306620 is an abundant number, since it is smaller than the sum of its proper divisors (337324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

306620 is a wasteful number, since it uses less digits than its factorization.

306620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15340 (or 15338 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 306620 is about 553.7327875429. The cubic root of 306620 is about 67.4321219796.

Subtracting from 306620 its sum of digits (17), we obtain a palindrome (306603).

The spelling of 306620 in words is "three hundred six thousand, six hundred twenty".