30728507488899 has 16 divisors (see below), whose sum is σ = 44696123775360. Its totient is φ = 18623290837760.

The previous prime is 30728507488897. The next prime is 30728507488909. The reversal of 30728507488899 is 99888470582703.

It is a Cunningham number, because it is equal to 5543330²-1.

It is a cyclic number.

It is not a de Polignac number, because 30728507488899 - 2¹ = 30728507488897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30728507488897) 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, 15706099 + ... + 17553875.

It is an arithmetic number, because the mean of its divisors is an integer number (2793507735960).

Almost surely, 2^{30728507488899} is an apocalyptic number.

30728507488899 is a deficient number, since it is larger than the sum of its proper divisors (13967616286461).

30728507488899 is a wasteful number, since it uses less digits than its factorization.

30728507488899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2351730.

The product of its (nonzero) digits is 1950842880, while the sum is 78.

The spelling of 30728507488899 in words is "thirty trillion, seven hundred twenty-eight billion, five hundred seven million, four hundred eighty-eight thousand, eight hundred ninety-nine".