30872785720 has 128 divisors (see below), whose sum is σ = 80392435200. Its totient is φ = 10451750400.

The previous prime is 30872785717. The next prime is 30872785733. The reversal of 30872785720 is 2758727803.

It is a super-2 number, since 2×30872785720² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7737486 + ... + 7741474.

It is an arithmetic number, because the mean of its divisors is an integer number (628065900).

Almost surely, 2^30872785720 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 30872785720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40196217600).

30872785720 is an abundant number, since it is smaller than the sum of its proper divisors (49519649480).

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

30872785720 is a wasteful number, since it uses less digits than its factorization.

30872785720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4349 (or 4345 counting only the distinct ones).

The product of its (nonzero) digits is 1317120, while the sum is 49.

The spelling of 30872785720 in words is "thirty billion, eight hundred seventy-two million, seven hundred eighty-five thousand, seven hundred twenty".