30001021328 has 10 divisors (see below), whose sum is σ = 58126978854. Its totient is φ = 15000510656.

The previous prime is 30001021327. The next prime is 30001021361. The reversal of 30001021328 is 82312010003.

It can be written as a sum of positive squares in only one way, i.e., 29414994064 + 586027264 = 171508^2 + 24208^2 .

It is a super-2 number, since 2×30001021328² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30001021327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 937531901 + ... + 937531932.

Almost surely, 2^30001021328 is an apocalyptic number.

It is an amenable number.

30001021328 is a deficient number, since it is larger than the sum of its proper divisors (28125957526).

30001021328 is a wasteful number, since it uses less digits than its factorization.

30001021328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1875063841 (or 1875063835 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The spelling of 30001021328 in words is "thirty billion, one million, twenty-one thousand, three hundred twenty-eight".