28558634049 has 63 divisors (see below), whose sum is σ = 47147673139. Its totient is φ = 17277844320.

The previous prime is 28558634047. The next prime is 28558634059. The reversal of 28558634049 is 94043685582.

The square root of 28558634049 is 168993.

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

28558634049 is a `hidden beast` number, since 2 + 8 + 558 + 6 + 3 + 40 + 49 = 666.

It can be written as a sum of positive squares in only one way, i.e., 4706920449 + 23851713600 = 68607^2 + 154440^2 .

It is not a de Polignac number, because 28558634049 - 2¹ = 28558634047 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28558633986 and 28558634004.

It is not an unprimeable number, because it can be changed into a prime (28558634047) by changing a digit.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 50190637 + ... + 50191205.

Almost surely, 2^28558634049 is an apocalyptic number.

28558634049 is the 168993-rd square number.

28558634049 is the 84497-th centered octagonal number.

It is an amenable number.

28558634049 is a deficient number, since it is larger than the sum of its proper divisors (18589039090).

28558634049 is an frugal number, since it uses more digits than its factorization.

28558634049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1178 (or 583 counting only the distinct ones).

The product of its (nonzero) digits is 8294400, while the sum is 54.

The spelling of 28558634049 in words is "twenty-eight billion, five hundred fifty-eight million, six hundred thirty-four thousand, forty-nine".