30000056 has 16 divisors (see below), whose sum is σ = 57043440. Its totient is φ = 14788480.

The previous prime is 30000049. The next prime is 30000059. The reversal of 30000056 is 65000003.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30000059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25841 + ... + 26976.

It is an arithmetic number, because the mean of its divisors is an integer number (3565215).

Almost surely, 2^30000056 is an apocalyptic number.

It is an amenable number.

30000056 is a deficient number, since it is larger than the sum of its proper divisors (27043384).

30000056 is a wasteful number, since it uses less digits than its factorization.

30000056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52894 (or 52890 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 14.

The square root of 30000056 is about 5477.2306871265. The cubic root of 30000056 is about 310.7234439342.

Adding to 30000056 its reverse (65000003), we get a palindrome (95000059).

The spelling of 30000056 in words is "thirty million, fifty-six", and thus it is an aban number, an eban number, and an uban number.