30402009 has 12 divisors (see below), whose sum is σ = 47906352. Its totient is φ = 18425400.

The previous prime is 30401981. The next prime is 30402013. The reversal of 30402009 is 90020403.

It is not a de Polignac number, because 30402009 - 2⁵ = 30401977 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30401982 and 30402000.

It is not an unprimeable number, because it can be changed into a prime (30402209) 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 11 ways as a sum of consecutive naturals, for example, 153447 + ... + 153644.

It is an arithmetic number, because the mean of its divisors is an integer number (3992196).

Almost surely, 2^30402009 is an apocalyptic number.

It is an amenable number.

30402009 is a deficient number, since it is larger than the sum of its proper divisors (17504343).

30402009 is a wasteful number, since it uses less digits than its factorization.

30402009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307108 (or 307105 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 30402009 is about 5513.8016830495. The cubic root of 30402009 is about 312.1050250470.

The spelling of 30402009 in words is "thirty million, four hundred two thousand, nine".