30391728120 has 192 divisors, whose sum is σ = 110311175520. Its totient is φ = 7481009664.

The previous prime is 30391728089. The next prime is 30391728167. The reversal of 30391728120 is 2182719303.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6102 + ... + 246618.

Almost surely, 2^30391728120 is an apocalyptic number.

30391728120 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30391728120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55155587760).

30391728120 is an abundant number, since it is smaller than the sum of its proper divisors (79919447400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30391728120 is a wasteful number, since it uses less digits than its factorization.

30391728120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240556 (or 240540 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The spelling of 30391728120 in words is "thirty billion, three hundred ninety-one million, seven hundred twenty-eight thousand, one hundred twenty".