30381451128 has 192 divisors, whose sum is σ = 99710170560. Its totient is φ = 8158261248.

The previous prime is 30381451127. The next prime is 30381451151. The reversal of 30381451128 is 82115418303.

30381451128 is a `hidden beast` number, since 3 + 0 + 3 + 81 + 451 + 128 = 666.

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 = 30381451092 and 30381451101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30381451127) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7306426 + ... + 7310582.

It is an arithmetic number, because the mean of its divisors is an integer number (519323805).

Almost surely, 2^30381451128 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 30381451128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49855085280).

30381451128 is an abundant number, since it is smaller than the sum of its proper divisors (69328719432).

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

30381451128 is a wasteful number, since it uses less digits than its factorization.

30381451128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5046 (or 5039 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The spelling of 30381451128 in words is "thirty billion, three hundred eighty-one million, four hundred fifty-one thousand, one hundred twenty-eight".