30028309 has 8 divisors (see below), whose sum is σ = 30380000. Its totient is φ = 29678832.

The previous prime is 30028289. The next prime is 30028337. The reversal of 30028309 is 90382003.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30028309 - 2¹¹ = 30026261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30028399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48202 + ... + 48820.

It is an arithmetic number, because the mean of its divisors is an integer number (3797500).

Almost surely, 2^30028309 is an apocalyptic number.

It is an amenable number.

30028309 is a deficient number, since it is larger than the sum of its proper divisors (351691).

30028309 is a wasteful number, since it uses less digits than its factorization.

30028309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1107.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 30028309 is about 5479.8092120073. The cubic root of 30028309 is about 310.8209561413.

It can be divided in two parts, 3002 and 8309, that added together give a palindrome (11311).

The spelling of 30028309 in words is "thirty million, twenty-eight thousand, three hundred nine".