30720568 has 16 divisors (see below), whose sum is σ = 60633000. Its totient is φ = 14551776.

The previous prime is 30720559. The next prime is 30720577. The reversal of 30720568 is 86502703.

It is an interprime number because it is at equal distance from previous prime (30720559) and next prime (30720577).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 100903 + ... + 101206.

Almost surely, 2^30720568 is an apocalyptic number.

30720568 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

30720568 is a deficient number, since it is larger than the sum of its proper divisors (29912432).

30720568 is a wasteful number, since it uses less digits than its factorization.

30720568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202134 (or 202130 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 30720568 is about 5542.6138238199. The cubic root of 30720568 is about 313.1913415289.

The spelling of 30720568 in words is "thirty million, seven hundred twenty thousand, five hundred sixty-eight".