28243557263 has 4 divisors (see below), whose sum is σ = 28243941528. Its totient is φ = 28243173000.

The previous prime is 28243557241. The next prime is 28243557269. The reversal of 28243557263 is 36275534282.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28243557263 - 2¹⁰ = 28243556239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28243557269) 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, 43613 + ... + 241638.

It is an arithmetic number, because the mean of its divisors is an integer number (7060985382).

Almost surely, 2^28243557263 is an apocalyptic number.

28243557263 is a deficient number, since it is larger than the sum of its proper divisors (384265).

28243557263 is an equidigital number, since it uses as much as digits as its factorization.

28243557263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384264.

The product of its digits is 2419200, while the sum is 47.

The spelling of 28243557263 in words is "twenty-eight billion, two hundred forty-three million, five hundred fifty-seven thousand, two hundred sixty-three".