28735299193 has 4 divisors (see below), whose sum is σ = 28928153700. Its totient is φ = 28542444688.

The previous prime is 28735299157. The next prime is 28735299217. The reversal of 28735299193 is 39199253782.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3813309504 + 24921989689 = 61752^2 + 157867^2 .

It is a cyclic number.

It is not a de Polignac number, because 28735299193 - 2⁹ = 28735298681 is a prime.

It is a super-2 number, since 2×28735299193² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28735290193) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 96427030 + ... + 96427327.

It is an arithmetic number, because the mean of its divisors is an integer number (7232038425).

Almost surely, 2^28735299193 is an apocalyptic number.

It is an amenable number.

28735299193 is a deficient number, since it is larger than the sum of its proper divisors (192854507).

28735299193 is a wasteful number, since it uses less digits than its factorization.

28735299193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192854506.

The product of its digits is 7348320, while the sum is 58.

The spelling of 28735299193 in words is "twenty-eight billion, seven hundred thirty-five million, two hundred ninety-nine thousand, one hundred ninety-three".