30016720 has 20 divisors (see below), whose sum is σ = 69789060. Its totient is φ = 12006656.

The previous prime is 30016717. The next prime is 30016733. The reversal of 30016720 is 2761003.

It can be written as a sum of positive squares in 2 ways, for example, as 14837904 + 15178816 = 3852^2 + 3896^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187525 + ... + 187684.

It is an arithmetic number, because the mean of its divisors is an integer number (3489453).

Almost surely, 2^30016720 is an apocalyptic number.

It is an amenable number.

30016720 is an abundant number, since it is smaller than the sum of its proper divisors (39772340).

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

30016720 is a wasteful number, since it uses less digits than its factorization.

30016720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375222 (or 375216 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 30016720 is about 5478.7516826372. The cubic root of 30016720 is about 310.7809653496.

Adding to 30016720 its reverse (2761003), we get a palindrome (32777723).

It can be divided in two parts, 300 and 16720, that added together give a triangular number (17020 = T₁₈₄).

The spelling of 30016720 in words is "thirty million, sixteen thousand, seven hundred twenty".