72530308 has 12 divisors (see below), whose sum is σ = 126999180. Its totient is φ = 36244832.

The previous prime is 72530261. The next prime is 72530309. The reversal of 72530308 is 80303527.

It can be written as a sum of positive squares in 2 ways, for example, as 26399044 + 46131264 = 5138^2 + 6792^2 .

It is not an unprimeable number, because it can be changed into a prime (72530309) 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 3 ways as a sum of consecutive naturals, for example, 5310 + ... + 13162.

It is an arithmetic number, because the mean of its divisors is an integer number (10583265).

Almost surely, 2^72530308 is an apocalyptic number.

It is an amenable number.

72530308 is a deficient number, since it is larger than the sum of its proper divisors (54468872).

72530308 is a wasteful number, since it uses less digits than its factorization.

72530308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10166 (or 10164 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 72530308 is about 8516.4727440414. The cubic root of 72530308 is about 417.0356422981.

The spelling of 72530308 in words is "seventy-two million, five hundred thirty thousand, three hundred eight".