30995120128 has 228 divisors, whose sum is σ = 76503959040. Its totient is φ = 12485394432.

The previous prime is 30995120089. The next prime is 30995120129. The reversal of 30995120128 is 82102159903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30995120129) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 244056001 + ... + 244056127.

It is an arithmetic number, because the mean of its divisors is an integer number (335543680).

Almost surely, 2^30995120128 is an apocalyptic number.

30995120128 is a gapful number since it is divisible by the number (38) 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 30995120128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38251979520).

30995120128 is an abundant number, since it is smaller than the sum of its proper divisors (45508838912).

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

30995120128 is an frugal number, since it uses more digits than its factorization.

30995120128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196 (or 155 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 40.

The spelling of 30995120128 in words is "thirty billion, nine hundred ninety-five million, one hundred twenty thousand, one hundred twenty-eight".