30068720 has 80 divisors (see below), whose sum is σ = 77995008. Its totient is φ = 10686720.

The previous prime is 30068719. The next prime is 30068741. The reversal of 30068720 is 2786003.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 30068720.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40997 + ... + 41723.

Almost surely, 2^30068720 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 30068720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38997504).

30068720 is an abundant number, since it is smaller than the sum of its proper divisors (47926288).

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

30068720 is a wasteful number, since it uses less digits than its factorization.

30068720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798 (or 792 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 30068720 is about 5483.4952357051. The cubic root of 30068720 is about 310.9603241328.

The spelling of 30068720 in words is "thirty million, sixty-eight thousand, seven hundred twenty".