28262808449 has 4 divisors (see below), whose sum is σ = 28311791364. Its totient is φ = 28213825536.

The previous prime is 28262808439. The next prime is 28262808481. The reversal of 28262808449 is 94480826282.

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 18329098225 + 9933710224 = 135385^2 + 99668^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28262808449 is a prime.

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 28262808449.

It is not an unprimeable number, because it can be changed into a prime (28262808439) 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, 24490592 + ... + 24491745.

It is an arithmetic number, because the mean of its divisors is an integer number (7077947841).

Almost surely, 2^28262808449 is an apocalyptic number.

It is an amenable number.

28262808449 is a deficient number, since it is larger than the sum of its proper divisors (48982915).

28262808449 is an equidigital number, since it uses as much as digits as its factorization.

28262808449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48982914.

The product of its (nonzero) digits is 3538944, while the sum is 53.

The spelling of 28262808449 in words is "twenty-eight billion, two hundred sixty-two million, eight hundred eight thousand, four hundred forty-nine".