30668409 has 16 divisors (see below), whose sum is σ = 45771840. Its totient is φ = 20293920.

The previous prime is 30668401. The next prime is 30668411. The reversal of 30668409 is 90486603.

It is not a de Polignac number, because 30668409 - 2³ = 30668401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30668401) 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 15 ways as a sum of consecutive naturals, for example, 447 + ... + 7844.

It is an arithmetic number, because the mean of its divisors is an integer number (2860740).

Almost surely, 2^30668409 is an apocalyptic number.

It is an amenable number.

30668409 is a deficient number, since it is larger than the sum of its proper divisors (15103431).

30668409 is a wasteful number, since it uses less digits than its factorization.

30668409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8437 (or 8431 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 30668409 is about 5537.9065539245. The cubic root of 30668409 is about 313.0139901949.

The spelling of 30668409 in words is "thirty million, six hundred sixty-eight thousand, four hundred nine".