28307127193 has 12 divisors (see below), whose sum is σ = 30095363500. Its totient is φ = 26619708672.

The previous prime is 28307127179. The next prime is 28307127209. The reversal of 28307127193 is 39172170382.

It can be written as a sum of positive squares in 6 ways, for example, as 2067339024 + 26239788169 = 45468^2 + 161987^2 .

It is a de Polignac number, because none of the positive numbers 2^k-28307127193 is a prime.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (28307124193) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 310183 + ... + 390931.

Almost surely, 2^28307127193 is an apocalyptic number.

It is an amenable number.

28307127193 is a deficient number, since it is larger than the sum of its proper divisors (1788236307).

28307127193 is a wasteful number, since it uses less digits than its factorization.

28307127193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81996 (or 81979 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 43.

The spelling of 28307127193 in words is "twenty-eight billion, three hundred seven million, one hundred twenty-seven thousand, one hundred ninety-three".