30028019 has 4 divisors (see below), whose sum is σ = 34317744. Its totient is φ = 25738296.

The previous prime is 30028003. The next prime is 30028027. The reversal of 30028019 is 91082003.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 30028019 - 2⁴ = 30028003 is a prime.

It is a super-3 number, since 3×30028019³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30027985 and 30028003.

It is not an unprimeable number, because it can be changed into a prime (30048019) 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, 2144852 + ... + 2144865.

It is an arithmetic number, because the mean of its divisors is an integer number (8579436).

Almost surely, 2^30028019 is an apocalyptic number.

30028019 is a deficient number, since it is larger than the sum of its proper divisors (4289725).

30028019 is an equidigital number, since it uses as much as digits as its factorization.

30028019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4289724.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 30028019 is about 5479.7827511682. The cubic root of 30028019 is about 310.8199555481.

The spelling of 30028019 in words is "thirty million, twenty-eight thousand, nineteen".