30728241880 has 128 divisors (see below), whose sum is σ = 83962759680. Its totient is φ = 9880197120.

The previous prime is 30728241827. The next prime is 30728241883. The reversal of 30728241880 is 8814282703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30728241883) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1335675 + ... + 1358485.

It is an arithmetic number, because the mean of its divisors is an integer number (655959060).

Almost surely, 2^30728241880 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 30728241880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41981379840).

30728241880 is an abundant number, since it is smaller than the sum of its proper divisors (53234517800).

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

30728241880 is a wasteful number, since it uses less digits than its factorization.

30728241880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23129 (or 23125 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 43.

The spelling of 30728241880 in words is "thirty billion, seven hundred twenty-eight million, two hundred forty-one thousand, eight hundred eighty".