28247782529 has 4 divisors (see below), whose sum is σ = 28326467520. Its totient is φ = 28169097540.

The previous prime is 28247782499. The next prime is 28247782531. The reversal of 28247782529 is 92528774282.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28247782529 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28247782229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39341957 + ... + 39342674.

It is an arithmetic number, because the mean of its divisors is an integer number (7081616880).

Almost surely, 2^28247782529 is an apocalyptic number.

It is an amenable number.

28247782529 is a deficient number, since it is larger than the sum of its proper divisors (78684991).

28247782529 is an equidigital number, since it uses as much as digits as its factorization.

28247782529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78684990.

The product of its digits is 9031680, while the sum is 56.

The spelling of 28247782529 in words is "twenty-eight billion, two hundred forty-seven million, seven hundred eighty-two thousand, five hundred twenty-nine".