30328819 has 4 divisors (see below), whose sum is σ = 31307200. Its totient is φ = 29350440.

The previous prime is 30328813. The next prime is 30328847. The reversal of 30328819 is 91882303.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91882303 = 491 ⋅187133.

It is a cyclic number.

It is not a de Polignac number, because 30328819 - 2⁵ = 30328787 is a prime.

It is a super-2 number, since 2×30328819² = 1839674523869522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30328813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 489144 + ... + 489205.

It is an arithmetic number, because the mean of its divisors is an integer number (7826800).

Almost surely, 2^30328819 is an apocalyptic number.

30328819 is a deficient number, since it is larger than the sum of its proper divisors (978381).

30328819 is an equidigital number, since it uses as much as digits as its factorization.

30328819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978380.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 30328819 is about 5507.1607022131. The cubic root of 30328819 is about 311.8543692201.

The spelling of 30328819 in words is "thirty million, three hundred twenty-eight thousand, eight hundred nineteen".