30530128 has 10 divisors (see below), whose sum is σ = 59152154. Its totient is φ = 15265056.

The previous prime is 30530111. The next prime is 30530153. The reversal of 30530128 is 82103503.

It can be written as a sum of positive squares in only one way, i.e., 20720704 + 9809424 = 4552^2 + 3132^2 .

It is a junction number, because it is equal to n+sod(n) for n = 30530099 and 30530108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 954051 + ... + 954082.

Almost surely, 2^30530128 is an apocalyptic number.

It is an amenable number.

30530128 is a deficient number, since it is larger than the sum of its proper divisors (28622026).

30530128 is a wasteful number, since it uses less digits than its factorization.

30530128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1908141 (or 1908135 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 30530128 is about 5525.4074962848. The cubic root of 30530128 is about 312.5428310360.

The spelling of 30530128 in words is "thirty million, five hundred thirty thousand, one hundred twenty-eight".