30304919 has 4 divisors (see below), whose sum is σ = 30523080. Its totient is φ = 30086760.

The previous prime is 30304871. The next prime is 30304933. The reversal of 30304919 is 91940303.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30304919 is a prime.

It is a super-2 number, since 2×30304919² = 1836776231193122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30304891 and 30304900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30304979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108872 + ... + 109149.

It is an arithmetic number, because the mean of its divisors is an integer number (7630770).

Almost surely, 2^30304919 is an apocalyptic number.

30304919 is a deficient number, since it is larger than the sum of its proper divisors (218161).

30304919 is a wasteful number, since it uses less digits than its factorization.

30304919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218160.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 30304919 is about 5504.9903723803. The cubic root of 30304919 is about 311.7724308928.

The spelling of 30304919 in words is "thirty million, three hundred four thousand, nine hundred nineteen".