30061305 has 12 divisors (see below), whose sum is σ = 52106340. Its totient is φ = 16032672.

The previous prime is 30061301. The next prime is 30061307. The reversal of 30061305 is 50316003.

30061305 is a `hidden beast` number, since 300 + 61 + 305 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5588496 + 24472809 = 2364^2 + 4947^2 .

It is not a de Polignac number, because 30061305 - 2² = 30061301 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (30061301) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 333970 + ... + 334059.

It is an arithmetic number, because the mean of its divisors is an integer number (4342195).

Almost surely, 2^30061305 is an apocalyptic number.

It is an amenable number.

30061305 is a deficient number, since it is larger than the sum of its proper divisors (22045035).

30061305 is a wasteful number, since it uses less digits than its factorization.

30061305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668040 (or 668037 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 18.

The square root of 30061305 is about 5482.8190741625. The cubic root of 30061305 is about 310.9347609078.

Adding to 30061305 its reverse (50316003), we get a palindrome (80377308).

The spelling of 30061305 in words is "thirty million, sixty-one thousand, three hundred five".