30681489 has 16 divisors (see below), whose sum is σ = 42888384. Its totient is φ = 19488000.

The previous prime is 30681451. The next prime is 30681493. The reversal of 30681489 is 98418603.

It is not a de Polignac number, because 30681489 - 2⁷ = 30681361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30681419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2389 + ... + 8189.

It is an arithmetic number, because the mean of its divisors is an integer number (2680524).

Almost surely, 2^30681489 is an apocalyptic number.

It is an amenable number.

30681489 is a deficient number, since it is larger than the sum of its proper divisors (12206895).

30681489 is a wasteful number, since it uses less digits than its factorization.

30681489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5888.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 30681489 is about 5539.0873797043. The cubic root of 30681489 is about 313.0584837656.

The spelling of 30681489 in words is "thirty million, six hundred eighty-one thousand, four hundred eighty-nine".