30000005 has 12 divisors (see below), whose sum is σ = 41877900. Its totient is φ = 20571264.

The previous prime is 30000001. The next prime is 30000023. The reversal of 30000005 is 50000003.

It can be written as a sum of positive squares in 2 ways, for example, as 4739329 + 25260676 = 2177^2 + 5026^2 .

It is not a de Polignac number, because 30000005 - 2² = 30000001 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 29999947 and 30000001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30000001) 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, 60980 + ... + 61469.

It is an arithmetic number, because the mean of its divisors is an integer number (3489825).

Almost surely, 2^30000005 is an apocalyptic number.

30000005 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

30000005 is a deficient number, since it is larger than the sum of its proper divisors (11877895).

30000005 is a wasteful number, since it uses less digits than its factorization.

30000005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122468 (or 122461 counting only the distinct ones).

The product of its (nonzero) digits is 15, while the sum is 8.

The square root of 30000005 is about 5477.2260314871. The cubic root of 30000005 is about 310.7232678578.

Adding to 30000005 its reverse (50000003), we get a palindrome (80000008).

The spelling of 30000005 in words is "thirty million, five", and thus it is an aban number and an uban number.