30689568 has 144 divisors (see below), whose sum is σ = 107505216. Its totient is φ = 8087040.

The previous prime is 30689563. The next prime is 30689587. The reversal of 30689568 is 86598603.

30689568 is a `hidden beast` number, since 3 + 0 + 6 + 89 + 568 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is not an unprimeable number, because it can be changed into a prime (30689563) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25623 + ... + 26793.

It is an arithmetic number, because the mean of its divisors is an integer number (746564).

Almost surely, 2^30689568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30689568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53752608).

30689568 is an abundant number, since it is smaller than the sum of its proper divisors (76815648).

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

30689568 is a wasteful number, since it uses less digits than its factorization.

30689568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1207 (or 1196 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 30689568 is about 5539.8166034626. The cubic root of 30689568 is about 313.0859593718.

The spelling of 30689568 in words is "thirty million, six hundred eighty-nine thousand, five hundred sixty-eight".