30312012140 has 96 divisors (see below), whose sum is σ = 67931136000. Its totient is φ = 11328913152.

The previous prime is 30312012079. The next prime is 30312012161. The reversal of 30312012140 is 4121021303.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10527221 + ... + 10530099.

It is an arithmetic number, because the mean of its divisors is an integer number (707616000).

Almost surely, 2^30312012140 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 30312012140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33965568000).

30312012140 is an abundant number, since it is smaller than the sum of its proper divisors (37619123860).

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

30312012140 is a wasteful number, since it uses less digits than its factorization.

30312012140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3279 (or 3277 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 30312012140 its reverse (4121021303), we get a palindrome (34433033443).

The spelling of 30312012140 in words is "thirty billion, three hundred twelve million, twelve thousand, one hundred forty".