28053905049 has 27 divisors (see below), whose sum is σ = 41894907327. Its totient is φ = 18089244000.

The previous prime is 28053905029. The next prime is 28053905081. The reversal of 28053905049 is 94050935082.

The square root of 28053905049 is 167493.

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

28053905049 is a `hidden beast` number, since 2 + 8 + 0 + 53 + 90 + 504 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3642967449 + 24410937600 = 60357^2 + 156240^2 .

It is not a de Polignac number, because 28053905049 - 2⁵ = 28053905017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28053904995 and 28053905013.

It is not an unprimeable number, because it can be changed into a prime (28053905029) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 15575949 + ... + 15577749.

Almost surely, 2^28053905049 is an apocalyptic number.

28053905049 is the 167493-rd square number.

28053905049 is the 83747-th centered octagonal number.

It is an amenable number.

28053905049 is a deficient number, since it is larger than the sum of its proper divisors (13841002278).

28053905049 is an frugal number, since it uses more digits than its factorization.

28053905049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3670 (or 1835 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 45.

The spelling of 28053905049 in words is "twenty-eight billion, fifty-three million, nine hundred five thousand, forty-nine".