30123728134 has 16 divisors (see below), whose sum is σ = 47206534320. Its totient is φ = 14398501600.

The previous prime is 30123728111. The next prime is 30123728143. The reversal of 30123728134 is 43182732103.

It is a super-2 number, since 2×30123728134² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 30123728134.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2565304 + ... + 2577019.

It is an arithmetic number, because the mean of its divisors is an integer number (2950408395).

Almost surely, 2^30123728134 is an apocalyptic number.

30123728134 is a deficient number, since it is larger than the sum of its proper divisors (17082806186).

30123728134 is a wasteful number, since it uses less digits than its factorization.

30123728134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5142455.

The product of its (nonzero) digits is 24192, while the sum is 34.

The spelling of 30123728134 in words is "thirty billion, one hundred twenty-three million, seven hundred twenty-eight thousand, one hundred thirty-four".