68306530 has 16 divisors (see below), whose sum is σ = 123322680. Its totient is φ = 27240192.

The previous prime is 68306471. The next prime is 68306543. The reversal of 68306530 is 3560386.

It can be written as a sum of positive squares in 4 ways, for example, as 55965361 + 12341169 = 7481^2 + 3513^2 .

It is a junction number, because it is equal to n+sod(n) for n = 68306492 and 68306501.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6765 + ... + 13504.

Almost surely, 2^68306530 is an apocalyptic number.

68306530 is a deficient number, since it is larger than the sum of its proper divisors (55016150).

68306530 is a wasteful number, since it uses less digits than its factorization.

68306530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20613.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 68306530 is about 8264.7764640068. The cubic root of 68306530 is about 408.7778996316. Note that the first 3 decimals are identical.

The spelling of 68306530 in words is "sixty-eight million, three hundred six thousand, five hundred thirty".