30028079 has 4 divisors (see below), whose sum is σ = 31063560. Its totient is φ = 28992600.

The previous prime is 30028027. The next prime is 30028091. The reversal of 30028079 is 97082003.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97082003 = 43 ⋅2257721.

It is a cyclic number.

It is not a de Polignac number, because 30028079 - 2²⁴ = 13250863 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 1035451 = 30028079 / (3 + 0 + 0 + 2 + 8 + 0 + 7 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30028279) 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, 517697 + ... + 517754.

It is an arithmetic number, because the mean of its divisors is an integer number (7765890).

Almost surely, 2^30028079 is an apocalyptic number.

30028079 is a deficient number, since it is larger than the sum of its proper divisors (1035481).

30028079 is a wasteful number, since it uses less digits than its factorization.

30028079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1035480.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 30028079 is about 5479.7882258350. The cubic root of 30028079 is about 310.8201625679.

The spelling of 30028079 in words is "thirty million, twenty-eight thousand, seventy-nine".