30831280128 has 378 divisors, whose sum is σ = 101527274212. Its totient is φ = 9342812160.

The previous prime is 30831280079. The next prime is 30831280171. The reversal of 30831280128 is 82108213803.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 30831280092 and 30831280101.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2802843643 + ... + 2802843653.

Almost surely, 2^30831280128 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 30831280128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50763637106).

30831280128 is an abundant number, since it is smaller than the sum of its proper divisors (70695994084).

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

30831280128 is an frugal number, since it uses more digits than its factorization.

30831280128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77 (or 16 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The spelling of 30831280128 in words is "thirty billion, eight hundred thirty-one million, two hundred eighty thousand, one hundred twenty-eight".