306642242 has 8 divisors (see below), whose sum is σ = 467503932. Its totient is φ = 150807600.

The previous prime is 306642229. The next prime is 306642247. The reversal of 306642242 is 242246603.

It can be written as a sum of positive squares in 2 ways, for example, as 279591841 + 27050401 = 16721^2 + 5201^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (306642247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1256609 + ... + 1256852.

Almost surely, 2^306642242 is an apocalyptic number.

306642242 is a deficient number, since it is larger than the sum of its proper divisors (160861690).

306642242 is a wasteful number, since it uses less digits than its factorization.

306642242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2513524.

The product of its (nonzero) digits is 13824, while the sum is 29.

The square root of 306642242 is about 17511.2033281554. The cubic root of 306642242 is about 674.3375243317.

Adding to 306642242 its reverse (242246603), we get a palindrome (548888845).

The spelling of 306642242 in words is "three hundred six million, six hundred forty-two thousand, two hundred forty-two".