28286275273 has 4 divisors (see below), whose sum is σ = 28976184468. Its totient is φ = 27596366080.

The previous prime is 28286275267. The next prime is 28286275301. The reversal of 28286275273 is 37257268282.

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 12528996489 + 15757278784 = 111933^2 + 125528^2 .

It is a cyclic number.

It is not a de Polignac number, because 28286275273 - 2²¹ = 28284178121 is a prime.

It is a super-2 number, since 2×28286275273² (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 28286275273.

It is not an unprimeable number, because it can be changed into a prime (28286275223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 344954536 + ... + 344954617.

It is an arithmetic number, because the mean of its divisors is an integer number (7244046117).

Almost surely, 2^28286275273 is an apocalyptic number.

It is an amenable number.

28286275273 is a deficient number, since it is larger than the sum of its proper divisors (689909195).

28286275273 is an equidigital number, since it uses as much as digits as its factorization.

28286275273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689909194.

The product of its digits is 4515840, while the sum is 52.

The spelling of 28286275273 in words is "twenty-eight billion, two hundred eighty-six million, two hundred seventy-five thousand, two hundred seventy-three".