306740242 has 16 divisors (see below), whose sum is σ = 471350880. Its totient is φ = 149631552.

The previous prime is 306740227. The next prime is 306740243. The reversal of 306740242 is 242047603.

It is a self number, because there is not a number n which added to its sum of digits gives 306740242.

It is not an unprimeable number, because it can be changed into a prime (306740243) by changing a digit.

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, 106858 + ... + 109690.

It is an arithmetic number, because the mean of its divisors is an integer number (29459430).

Almost surely, 2^306740242 is an apocalyptic number.

306740242 is a deficient number, since it is larger than the sum of its proper divisors (164610638).

306740242 is a wasteful number, since it uses less digits than its factorization.

306740242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4137.

The product of its (nonzero) digits is 8064, while the sum is 28.

The square root of 306740242 is about 17514.0013132351. The cubic root of 306740242 is about 674.4093540076.

Adding to 306740242 its reverse (242047603), we get a palindrome (548787845).

The spelling of 306740242 in words is "three hundred six million, seven hundred forty thousand, two hundred forty-two".