30912427940 has 12 divisors (see below), whose sum is σ = 64916098716. Its totient is φ = 12364971168.

The previous prime is 30912427933. The next prime is 30912427969. The reversal of 30912427940 is 4972421903.

It can be written as a sum of positive squares in 2 ways, for example, as 11310747904 + 19601680036 = 106352^2 + 140006^2 .

It is a super-2 number, since 2×30912427940² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 772810679 + ... + 772810718.

It is an arithmetic number, because the mean of its divisors is an integer number (5409674893).

Almost surely, 2^30912427940 is an apocalyptic number.

It is an amenable number.

30912427940 is an abundant number, since it is smaller than the sum of its proper divisors (34003670776).

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

30912427940 is a wasteful number, since it uses less digits than its factorization.

30912427940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1545621406 (or 1545621404 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 41.

The spelling of 30912427940 in words is "thirty billion, nine hundred twelve million, four hundred twenty-seven thousand, nine hundred forty".