28459744249 has 4 divisors (see below), whose sum is σ = 29228926564. Its totient is φ = 27690561936.

The previous prime is 28459744207. The next prime is 28459744267. The reversal of 28459744249 is 94244795482.

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 22251092224 + 6208652025 = 149168^2 + 78795^2 .

It is a cyclic number.

It is not a de Polignac number, because 28459744249 - 2⁹ = 28459743737 is a prime.

It is a super-3 number, since 3×28459744249³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28459744193 and 28459744202.

It is not an unprimeable number, because it can be changed into a prime (28459744289) 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, 384591102 + ... + 384591175.

It is an arithmetic number, because the mean of its divisors is an integer number (7307231641).

Almost surely, 2^28459744249 is an apocalyptic number.

It is an amenable number.

28459744249 is a deficient number, since it is larger than the sum of its proper divisors (769182315).

28459744249 is an equidigital number, since it uses as much as digits as its factorization.

28459744249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769182314.

The product of its digits is 23224320, while the sum is 58.

The spelling of 28459744249 in words is "twenty-eight billion, four hundred fifty-nine million, seven hundred forty-four thousand, two hundred forty-nine".