28282828281 has 4 divisors (see below), whose sum is σ = 37710437712. Its totient is φ = 18855218852.

The previous prime is 28282828229. The next prime is 28282828283. The reversal of 28282828281 is 18282828282.

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 not a de Polignac number, because 28282828281 - 2¹⁴ = 28282811897 is a prime.

It is a super-2 number, since 2×28282828281² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28282828283) 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, 4713804711 + ... + 4713804716.

It is an arithmetic number, because the mean of its divisors is an integer number (9427609428).

Almost surely, 2^28282828281 is an apocalyptic number.

It is an amenable number.

28282828281 is a deficient number, since it is larger than the sum of its proper divisors (9427609431).

28282828281 is an equidigital number, since it uses as much as digits as its factorization.

28282828281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9427609430.

The product of its digits is 1048576, while the sum is 51.

Subtracting from 28282828281 its reverse (18282828282), we obtain a palindrome (9999999999).

The spelling of 28282828281 in words is "twenty-eight billion, two hundred eighty-two million, eight hundred twenty-eight thousand, two hundred eighty-one".