30728003215 has 16 divisors (see below), whose sum is σ = 45382897728. Its totient is φ = 19449812736.

The previous prime is 30728003209. The next prime is 30728003219. The reversal of 30728003215 is 51230082703.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30728003215 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30728003219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33766582 + ... + 33767491.

It is an arithmetic number, because the mean of its divisors is an integer number (2836431108).

Almost surely, 2^30728003215 is an apocalyptic number.

30728003215 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

30728003215 is a deficient number, since it is larger than the sum of its proper divisors (14654894513).

30728003215 is a wasteful number, since it uses less digits than its factorization.

30728003215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67534098.

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

Adding to 30728003215 its reverse (51230082703), we get a palindrome (81958085918).

The spelling of 30728003215 in words is "thirty billion, seven hundred twenty-eight million, three thousand, two hundred fifteen".