30908889 has 12 divisors (see below), whose sum is σ = 48705072. Its totient is φ = 18732600.

The previous prime is 30908887. The next prime is 30908903. The reversal of 30908889 is 98880903.

It is not a de Polignac number, because 30908889 - 2¹ = 30908887 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (30908887) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 156007 + ... + 156204.

It is an arithmetic number, because the mean of its divisors is an integer number (4058756).

Almost surely, 2^30908889 is an apocalyptic number.

It is an amenable number.

30908889 is a deficient number, since it is larger than the sum of its proper divisors (17796183).

30908889 is a wasteful number, since it uses less digits than its factorization.

30908889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312228 (or 312225 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 30908889 is about 5559.5763327793. The cubic root of 30908889 is about 313.8300058927.

The spelling of 30908889 in words is "thirty million, nine hundred eight thousand, eight hundred eighty-nine".