28571240273 has 4 divisors (see below), whose sum is σ = 28608202548. Its totient is φ = 28534278000.

The previous prime is 28571240239. The next prime is 28571240309. The reversal of 28571240273 is 37204217582.

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 1059046849 + 27512193424 = 32543^2 + 165868^2 .

It is a cyclic number.

It is not a de Polignac number, because 28571240273 - 2⁶ = 28571240209 is a prime.

It is a super-2 number, since 2×28571240273² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28571240273.

It is not an unprimeable number, because it can be changed into a prime (28571540273) 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, 18479978 + ... + 18481523.

It is an arithmetic number, because the mean of its divisors is an integer number (7152050637).

Almost surely, 2^28571240273 is an apocalyptic number.

It is an amenable number.

28571240273 is a deficient number, since it is larger than the sum of its proper divisors (36962275).

28571240273 is an equidigital number, since it uses as much as digits as its factorization.

28571240273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36962274.

The product of its (nonzero) digits is 188160, while the sum is 41.

The spelling of 28571240273 in words is "twenty-eight billion, five hundred seventy-one million, two hundred forty thousand, two hundred seventy-three".