28704830625 has 105 divisors (see below), whose sum is σ = 53994848149. Its totient is φ = 15248250000.

The previous prime is 28704830617. The next prime is 28704830641. The reversal of 28704830625 is 52603840782.

The square root of 28704830625 is 169425.

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

28704830625 is a `hidden beast` number, since 287 + 0 + 48 + 306 + 25 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2250458721 + 26454371904 = 47439^2 + 162648^2 .

It is not a de Polignac number, because 28704830625 - 2³ = 28704830617 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Duffinian number.

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 104 ways as a sum of consecutive naturals, for example, 114361750 + ... + 114362000.

Almost surely, 2^28704830625 is an apocalyptic number.

28704830625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28704830625 is the 169425-th square number.

28704830625 is the 84713-rd centered octagonal number.

It is an amenable number.

28704830625 is a deficient number, since it is larger than the sum of its proper divisors (25290017524).

28704830625 is an frugal number, since it uses more digits than its factorization.

28704830625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540 (or 259 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

It can be divided in two parts, 28704 and 830625, that added together give a square (859329 = 927²).

The spelling of 28704830625 in words is "twenty-eight billion, seven hundred four million, eight hundred thirty thousand, six hundred twenty-five".