306491330 has 16 divisors (see below), whose sum is σ = 575671104. Its totient is φ = 117266160.

The previous prime is 306491321. The next prime is 306491333. The reversal of 306491330 is 33194603.

It is a junction number, because it is equal to n+sod(n) for n = 306491293 and 306491302.

It is not an unprimeable number, because it can be changed into a prime (306491333) 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 7 ways as a sum of consecutive naturals, for example, 666056 + ... + 666515.

It is an arithmetic number, because the mean of its divisors is an integer number (35979444).

Almost surely, 2^306491330 is an apocalyptic number.

306491330 is a deficient number, since it is larger than the sum of its proper divisors (269179774).

306491330 is a wasteful number, since it uses less digits than its factorization.

306491330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1332601.

The product of its (nonzero) digits is 5832, while the sum is 29.

The square root of 306491330 is about 17506.8937850208. The cubic root of 306491330 is about 674.2268825593.

The spelling of 306491330 in words is "three hundred six million, four hundred ninety-one thousand, three hundred thirty".