30012816 has 20 divisors (see below), whose sum is σ = 77533232. Its totient is φ = 10004256.

The previous prime is 30012797. The next prime is 30012817. The reversal of 30012816 is 61821003.

It is a junction number, because it is equal to n+sod(n) for n = 30012792 and 30012801.

It is not an unprimeable number, because it can be changed into a prime (30012817) 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, 312586 + ... + 312681.

Almost surely, 2^30012816 is an apocalyptic number.

It is an amenable number.

30012816 is an abundant number, since it is smaller than the sum of its proper divisors (47520416).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30012816 is a wasteful number, since it uses less digits than its factorization.

30012816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625278 (or 625272 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 30012816 is about 5478.3953855121. The cubic root of 30012816 is about 310.7674912870.

Adding to 30012816 its reverse (61821003), we get a palindrome (91833819).

The spelling of 30012816 in words is "thirty million, twelve thousand, eight hundred sixteen".