306066820 has 48 divisors (see below), whose sum is σ = 691004160. Its totient is φ = 113508864.

The previous prime is 306066811. The next prime is 306066821. The reversal of 306066820 is 28660603.

It is not an unprimeable number, because it can be changed into a prime (306066821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9292 + ... + 26428.

It is an arithmetic number, because the mean of its divisors is an integer number (14395920).

Almost surely, 2^306066820 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 306066820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (345502080).

306066820 is an abundant number, since it is smaller than the sum of its proper divisors (384937340).

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

306066820 is a wasteful number, since it uses less digits than its factorization.

306066820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17212 (or 17210 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 306066820 is about 17494.7655028583. The cubic root of 306066820 is about 673.9154563511.

The spelling of 306066820 in words is "three hundred six million, sixty-six thousand, eight hundred twenty".