30128280625 has 45 divisors (see below), whose sum is σ = 38667199879. Its totient is φ = 23467340000.

The previous prime is 30128280613. The next prime is 30128280647. The reversal of 30128280625 is 52608282103.

The square root of 30128280625 is 173575.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 7 ways, for example, as 16717714209 + 13410566416 = 129297^2 + 115804^2 .

It is not a de Polignac number, because 30128280625 - 2⁹ = 30128280113 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 229986810 + ... + 229986940.

Almost surely, 2^30128280625 is an apocalyptic number.

30128280625 is the 173575-th square number.

30128280625 is the 86788-th centered octagonal number.

It is an amenable number.

30128280625 is a deficient number, since it is larger than the sum of its proper divisors (8538919254).

30128280625 is an frugal number, since it uses more digits than its factorization.

30128280625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388 (or 189 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 37.

The spelling of 30128280625 in words is "thirty billion, one hundred twenty-eight million, two hundred eighty thousand, six hundred twenty-five".