306530072 has 8 divisors (see below), whose sum is σ = 574743900. Its totient is φ = 153265032.

The previous prime is 306530071. The next prime is 306530093. The reversal of 306530072 is 270035603.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (306530071) 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 as a sum of consecutive naturals, namely, 19158122 + ... + 19158137.

Almost surely, 2^306530072 is an apocalyptic number.

It is an amenable number.

306530072 is a deficient number, since it is larger than the sum of its proper divisors (268213828).

306530072 is a wasteful number, since it uses less digits than its factorization.

306530072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38316265 (or 38316261 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 26.

The square root of 306530072 is about 17508.0002284670. Note that the first 3 decimals coincide. The cubic root of 306530072 is about 674.2552898852.

Adding to 306530072 its reverse (270035603), we get a palindrome (576565675).

The spelling of 306530072 in words is "three hundred six million, five hundred thirty thousand, seventy-two".