30728726866 has 16 divisors (see below), whose sum is σ = 49064205600. Its totient is φ = 14392163808.

The previous prime is 30728726851. The next prime is 30728726879. The reversal of 30728726866 is 66862782703.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4539600 + ... + 4546363.

It is an arithmetic number, because the mean of its divisors is an integer number (3066512850).

Almost surely, 2^30728726866 is an apocalyptic number.

30728726866 is a deficient number, since it is larger than the sum of its proper divisors (18335478734).

30728726866 is a wasteful number, since it uses less digits than its factorization.

30728726866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9086073.

The product of its (nonzero) digits is 8128512, while the sum is 55.

It can be divided in two parts, 307287 and 26866, that added together give a triangular number (334153 = T₈₁₇).

The spelling of 30728726866 in words is "thirty billion, seven hundred twenty-eight million, seven hundred twenty-six thousand, eight hundred sixty-six".