30105139860 has 192 divisors, whose sum is σ = 99887558400. Its totient is φ = 7501123584.

The previous prime is 30105139811. The next prime is 30105139861. The reversal of 30105139860 is 6893150103.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30105139861) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1264224 + ... + 1287816.

It is an arithmetic number, because the mean of its divisors is an integer number (520247700).

Almost surely, 2^30105139860 is an apocalyptic number.

30105139860 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 30105139860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49943779200).

30105139860 is an abundant number, since it is smaller than the sum of its proper divisors (69782418540).

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

30105139860 is a wasteful number, since it uses less digits than its factorization.

30105139860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23767 (or 23759 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

Adding to 30105139860 its reverse (6893150103), we get a palindrome (36998289963).

The spelling of 30105139860 in words is "thirty billion, one hundred five million, one hundred thirty-nine thousand, eight hundred sixty".