28247076849 has 4 divisors (see below), whose sum is σ = 37662769136. Its totient is φ = 18831384564.

The previous prime is 28247076817. The next prime is 28247076877. The reversal of 28247076849 is 94867074282.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 28247076849 - 2⁵ = 28247076817 is a prime.

It is a super-3 number, since 3×28247076849³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28247076889) 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, 4707846139 + ... + 4707846144.

It is an arithmetic number, because the mean of its divisors is an integer number (9415692284).

Almost surely, 2^28247076849 is an apocalyptic number.

It is an amenable number.

28247076849 is a deficient number, since it is larger than the sum of its proper divisors (9415692287).

28247076849 is an equidigital number, since it uses as much as digits as its factorization.

28247076849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9415692286.

The product of its (nonzero) digits is 10838016, while the sum is 57.

The spelling of 28247076849 in words is "twenty-eight billion, two hundred forty-seven million, seventy-six thousand, eight hundred forty-nine".