30125723208 has 128 divisors (see below), whose sum is σ = 87218208000. Its totient is φ = 8493281280.

The previous prime is 30125723197. The next prime is 30125723209. The reversal of 30125723208 is 80232752103.

It is a super-2 number, since 2×30125723208² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30125723209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8505918 + ... + 8509458.

It is an arithmetic number, because the mean of its divisors is an integer number (681392250).

Almost surely, 2^30125723208 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 30125723208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43609104000).

30125723208 is an abundant number, since it is smaller than the sum of its proper divisors (57092484792).

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

30125723208 is a wasteful number, since it uses less digits than its factorization.

30125723208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4215 (or 4211 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The spelling of 30125723208 in words is "thirty billion, one hundred twenty-five million, seven hundred twenty-three thousand, two hundred eight".