30309720880 has 80 divisors (see below), whose sum is σ = 71480424960. Its totient is φ = 11950735104.

The previous prime is 30309720871. The next prime is 30309720907. The reversal of 30309720880 is 8802790303.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3069391 + ... + 3079249.

It is an arithmetic number, because the mean of its divisors is an integer number (893505312).

Almost surely, 2^30309720880 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 30309720880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35740212480).

30309720880 is an abundant number, since it is smaller than the sum of its proper divisors (41170704080).

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

30309720880 is a wasteful number, since it uses less digits than its factorization.

30309720880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10418 (or 10412 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 40.

The spelling of 30309720880 in words is "thirty billion, three hundred nine million, seven hundred twenty thousand, eight hundred eighty".