306539680 has 48 divisors (see below), whose sum is σ = 726632424. Its totient is φ = 122204160.

The previous prime is 306539677. The next prime is 306539707. The reversal of 306539680 is 86935603.

It can be written as a sum of positive squares in 4 ways, for example, as 79495056 + 227044624 = 8916^2 + 15068^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

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 7 ways as a sum of consecutive naturals, for example, 47020 + ... + 53140.

Almost surely, 2^306539680 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 306539680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (363316212).

306539680 is an abundant number, since it is smaller than the sum of its proper divisors (420092744).

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

306539680 is a wasteful number, since it uses less digits than its factorization.

306539680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6449 (or 6441 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 306539680 is about 17508.2746151641. The cubic root of 306539680 is about 674.2623345199.

The spelling of 306539680 in words is "three hundred six million, five hundred thirty-nine thousand, six hundred eighty".