30750729 has 8 divisors (see below), whose sum is σ = 42323712. Its totient is φ = 19839120.

The previous prime is 30750691. The next prime is 30750743. The reversal of 30750729 is 92705703.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-30750729 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30750729.

It is not an unprimeable number, because it can be changed into a prime (30750799) 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 7 ways as a sum of consecutive naturals, for example, 165234 + ... + 165419.

It is an arithmetic number, because the mean of its divisors is an integer number (5290464).

Almost surely, 2^30750729 is an apocalyptic number.

It is an amenable number.

30750729 is a deficient number, since it is larger than the sum of its proper divisors (11572983).

30750729 is a wasteful number, since it uses less digits than its factorization.

30750729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330687.

The product of its (nonzero) digits is 13230, while the sum is 33.

The square root of 30750729 is about 5545.3339845315. Note that the first 3 decimals coincide. The cubic root of 30750729 is about 313.2938035490.

The spelling of 30750729 in words is "thirty million, seven hundred fifty thousand, seven hundred twenty-nine".