30780305248 has 144 divisors (see below), whose sum is σ = 77376110112. Its totient is φ = 11795097600.

The previous prime is 30780305209. The next prime is 30780305249. The reversal of 30780305248 is 84250308703.

It is a self number, because there is not a number n which added to its sum of digits gives 30780305248.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30780305249) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 1644036 + ... + 1662652.

It is an arithmetic number, because the mean of its divisors is an integer number (537334098).

Almost surely, 2^30780305248 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30780305248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38688055056).

30780305248 is an abundant number, since it is smaller than the sum of its proper divisors (46595804864).

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

30780305248 is a wasteful number, since it uses less digits than its factorization.

30780305248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18717 (or 18698 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 40.

The spelling of 30780305248 in words is "thirty billion, seven hundred eighty million, three hundred five thousand, two hundred forty-eight".