30008920 has 16 divisors (see below), whose sum is σ = 67520160. Its totient is φ = 12003552.

The previous prime is 30008917. The next prime is 30008921. The reversal of 30008920 is 2980003.

It is a junction number, because it is equal to n+sod(n) for n = 30008891 and 30008900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30008921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 375072 + ... + 375151.

It is an arithmetic number, because the mean of its divisors is an integer number (4220010).

Almost surely, 2^30008920 is an apocalyptic number.

It is an amenable number.

30008920 is an abundant number, since it is smaller than the sum of its proper divisors (37511240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30008920 is a wasteful number, since it uses less digits than its factorization.

30008920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 750234 (or 750230 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 30008920 is about 5478.0397954013. The cubic root of 30008920 is about 310.7540436703.

Adding to 30008920 its reverse (2980003), we get a palindrome (32988923).

The spelling of 30008920 in words is "thirty million, eight thousand, nine hundred twenty".